Sarah Palin took to Facebook again this weekend, posting about her youngest daughter’s graduation in the Alaskan snow:

One last blast of Alaska winter today, hopefully? This is what “Grad Blast” means in Alaska! We’ll move our graduation b-b-q indoors and watch the mini-blizzard from ’round the fireplace. (Global warming my gluteus maximus.)

When Palin was running for national office, she advocated capping carbon emissions and said man’s activities contribute to global warming. Over the last half decade, she has swung back to rejecting climate science and embracing carbon emissions:

Aug. 2008: Asked about global warming, said “I’m not one though who would attribute it to being man-made.”

Sep. 2008: Told Charlie Gibson: “I believe that man’s activities can certainly be contributing to the issue of global warming, climate change.”

Oct. 2008: Said during the vice presidential debate that she supported capping carbon emissions.

May 2009: Forced to cancel an appearance at White House Correspondents’ dinner because of a flooding disaster caused by an “unusually warm spring thaw in Alaska.”

Nov. 2009: Asked Rush Limbaugh, “Are we warming or are we cooling?”

Dec. 2009: Attacked climate scientists in a Washington Post op-ed, then said she would not debate Al Gore on climate change because “they don’t want to listen to the facts. They don’t want to listen to some reasonable voices in this.”

Feb. 2010: Asserted that climate science is “snake oil” and said “man-made global warming hysteria isn’t based on sound science.”

Apr. 2010: Dismissed “this snake oil science stuff that is based on this global warming, Gore-gate stuff

Jun. 2010: In the wake of the Deepwater Horizon spill, said “I chant, ‘drill, baby, drill,’ because it will help make the country energy independent.”

May 2011: At a motorcycle rally, exclaimed: “I love that smell of the emissions!”

Jan. 2012: In the middle of last winter, took to Facebook to ask, “What global warming?”.

Apr. 2012: Celebrated Earth Day by calling, yet again, to “drill, baby, drill.”

Palin is an entertainer now rather than a public servant and so her opinions alone do not merit much consideration. Yet her joking asides that cold weather means that climate change is not happening are representative of a larger skepticism and confusion about the link between climate and weather.

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By Dan Lashof Via NRDC Switchboard

With all the debate on the federal budget in Congress, climate change rarely gets mentioned as a deficit driver. Yet dealing with climate disruption was one of the largest non-defense discretionary budget items in 2012. Indeed, as NRDC shows in Who Pays for Climate Change?, when all federal spending on last year’s droughts, storms, floods, and forest fires are added up, the U.S. Climate Disruption Budget was nearly $100 billion, equivalent to 16% of total non-defense discretionary spending in the federal budget—larger than any official spending category.

That means that federal spending to deal with extreme weather made worse by climate change far exceeded total spending aimed at solving the problem. In fact, it was eight times EPA’s total budget and eight times total spending on energy.

Overall the insurance industry estimates that 2012 was the second costliest year in U.S. history for climate-related disasters, with over $139 billion in damages. But private insurers themselves only covered about 25% of these costs ($33 billion), leaving the federal government and its public insurance enterprises to pay for the majority of the remaining claims. As a result, the U.S. government paid more than three times as much as private insurers did for climate-related disasters in 2012.

That reflects a major shift in liabilities with respect to climate change away from private insurers to public alternatives that began in earnest following the $72 billion hit the industry took in 2005 from hurricane Katrina.

Federal spending related to climate disruption falls into two major categories: Storms and droughts.

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Dan Lashof is director of NRDC's climate and clean air program.

Warming-charged Superstorm Sandy affected electric grid security throughout Tri-State area.

This morning, CAP Senior Fellow Daniel J. Weiss testified before the Subcommittee on Energy and Power of the Committee on Energy and Commerce about electric grid reliability. He made a strong case for confronting the elephant in the room –the impact climate change has on the reliability and security of the electric grid. The other elephant in the room is the effect that burning fossil fuels for electricity has on our climate.

Thank you for the opportunity to testify on “American Energy Security and Innovation: Grid Reliability Challenges in a Shifting Energy-Resource Landscape.”

Discussing electricity security and innovation while ignoring climate change is like discussing personal health while ignoring cigarette smoking, diet, and exercise. Any examination of this shifting landscape must acknowledge that our electricity-generation systems produce much of the carbon pollution responsible for climate change and that the effects of climate change impair electricity reliability. Since coal-fired power plants emit one-third of the climate pollution in the United States, it is irresponsible to assess changes in our electricity system while ignoring climate pollution and its impacts.

Americans understand that extreme weather is related to man-made climate change that costs our economy billions of dollars annually. A recent poll from Yale University and George Mason University found that many Americans believe that global warming caused recent extreme weather and climatic events to be “more severe.”

Extreme weather events — including storms, floods, droughts, heat waves, and wildfires — threaten electricity reliability. The Congressional Research Service concluded that, “[P]ower delivery systems are most vulnerable to storms and extreme weather events.”

These events also threaten American lives and the economy. The most severe and extreme weather events caused 1,107 deaths and $188 billion in damages in 2011 and 2012.

A Center for American Progress analysis found that federal natural disaster-relief and recovery spending cost taxpayers $136 billion in the fiscal years from 2011 to 2013, or $400 per household annually. And the National Climate Assessment draft warns us that we can expect more extreme and severe weather, including droughts and rainstorms. The severe 2012 drought, for example, interfered with electricity generation in California, Connecticut, Illinois, and New York by shrinking the amount of cooling water available for power plants. It also disrupted oil and natural gas production.

Superstorm Sandy and other severe storms disrupted electricity transmission and distribution by downing power lines and damaging substations. The National Climate Assessment draft predicts that future climate-change-related events will interfere with electricity transmission.

We urge the subcommittee to support policies to achieve a more secure, reliable electricity system by accomplishing the following three goals:

1. The subcommittee should support policies that slow climate change by reducing carbon pollution from power plants, the largest uncontrolled source of emissions.

Failing that, EPA must at least comply with the Supreme Court by setting such standards under the Clean Air Act.

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Daniel J. Weiss is a Senior Fellow and the Director of Climate Strategy at the Center for American Progress Action Fund. Thanks to Mari Hernandez, Research Associate, and Jackie Weidman, Special Assistant, on the Energy Policy team of the Center for American Progress Action Fund.

The Midwest has experienced near record flooding this spring, resulting in four deaths, extensive property damage, and disruptions of agriculture and transportation. Evidence suggests that manmade climate change has increased the frequency of heavy downpours, and will continue to increase flooding risks. But in their ample coverage of Midwestern flooding, major media outlets rarely mentioned climate change.

By Jill Fitzsimmons & Shauna Theel, via Media Matters

Less Than 3 Percent Of Midwest Flood Stories Mention Climate Change

ABC, NBC And CNN Entirely Ignore Climate Connection. ABC, CBS, NBC and CNN devoted 74 full segments to flooding in the Midwest, but only one — on CBS Evening News — alluded to the fact that heavy downpours have increased (one percent of coverage). That segment did not explain that scientists have attributed this to climate change, and did not feature any scientists. MSNBC and Fox News were not included in this analysis because transcripts of their daytime coverage are not available in Nexis. [CBS News, 5/2/13]

USA TODAY Only National Print Outlet To Mention Climate Context Of Floods. USA TODAY, which recently launched a year-long series on the impacts of climate change, was the only national print outlet in our study that mentioned climate change in its reporting on Midwestern floods. The Associated Press, Reuters, Los Angeles Times, New York Times, and Wall Street Journal never mentioned climate change in a total of 35 articles on the floods. The Washington Post did not cover the flooding independently. In total, only 3 percent of national print coverage mentioned climate change. [USA TODAY, 4/22/13] [Media Matters, 3/1/13]

Local Media Largely Ignore Climate Context Of Floods. Less than 4 percent of local newspaper articles on flooding in the Midwest mentioned climate change — only 4 of 107 articles. The Kansas City Star, Des Moines Register, Detroit Free Press, Minneapolis Star-Tribune and Indianapolis Star never made that connection. Flooding in the area has nearly surpassed records, leading to four deaths, delays in planting agriculture, disruptions in transportation, and potential health impacts. [The Atlantic Wire, 4/25/13] [Union of Concerned Scientists, 4/30/13] [Climate Central, 4/26/13]

No Coverage Of Flooding Contribution To The Gulf “Dead Zone.” Aquatic ecologist Don Scavia told Media Matters in an email that “most media coverage is missing an important aspect of such flooding. These massive spring flooding events push an enormous amount of agricultural pollution down the Mississippi system and into the Gulf of Mexico. That flux will most certainly create a large dead zone.” He added that conservation policies for farmers “may no longer be adequate” as flooding risks increase from climate change. Indeed, our study found that aside from one article in the Des Moines Register, the media overlooked that flooding increases fertilizer runoff from Midwestern farms into the Gulf of Mexico, further contributing to the “dead zone” there. [UPI, 4/10/13]

Evidence Suggests Climate Change Worsens Flood Risks In Midwest

Warming Leads To More Overall Precipitation. As the Environmental Protection Agency explained, basic physics indicates that warming leads to more evaporation and thus more precipitation overall:

As average temperatures at the Earth’s surface rise (see the U.S. and Global Temperature indicator), more evaporation occurs, which, in turn, increases overall precipitation. Therefore, a warming climate is expected to increase precipitation in many areas. However, just as precipitation patterns vary across the world, so will the effects of climate change. By shifting the wind patterns and ocean currents that drive the world’s climate system, climate change will also cause some areas to experience decreased precipitation. In addition, higher temperatures lead to more evaporation, so increased precipitation will not necessarily increase the amount of water available for drinking, irrigation, and industry.”

The EPA created this map, based on 2012 data from the National Oceanic and Atmospheric Administration, showing that precipitation in most areas of the U.S. including the Midwest has increased over the last century:

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By Jeff Masters, via Weather Underground

The remarkable storm that brought record-breaking May snows and cold to the Midwest last week continues to spin over the Southeast U.S. The storm is unleashing flooding rains, bringing a case of “Weather Whiplash” to Georgia: flooding where extreme drought had existed just a few months ago. The storm formed when a loop in the jet stream of extreme amplitude got cut off from the main flow of the jet over the weekend, forming a “cutoff low” that is now slowly spinning down as it drifts east over the Southeast U.S. On Sunday, the storm dumped 3.4″ of rain on Atlanta, Georgia–that city’s sixth heaviest May calendar day rain storm since record keeping began in 1878. Remarkably, the rains were also able to bring rivers in Central Georgia above flood stage. This portion of the country was in “exceptional drought”–the worst category of drought–at the beginning of 2013.

Figure 1. The record May snowstorm that hit the Midwest U.S. on May 1 – 3, 2013, got cut off from the jet stream and was seen spinning over the Southeast U.S. on Sunday, May 5, in this image from NASA’s MODIS instrument. The 3.4″ of rain that fell on Atlanta, Georgia on May 5 was that city’s sixth heaviest May calendar day rainfall since record keeping began in 1878.

Weather Whiplash

Weather Whiplash — a term originally coined by science writer Andrew Freedman of climatecentral.org to describe extreme shifts between cold and hot weather — is also a excellent phrase we can use to describe some of the rapid transitions between extreme drought and floods seen in recent years. I brought up a remarkable example in mid-April, when a 200-mile stretch of the Mississippi River north of St. Louis reached damaging major flood levels less than four months after near-record low water levels restricted barge traffic, forcing the Army Corp to blast out rocks from the river bottom to enable navigation. As the climate warms, the new normal in coming decades is going to be more and more extreme “Weather Whiplash” drought-flood cycles like we have seen in the Midwest and in Georgia this year. A warmer atmosphere is capable of bringing heavier downpours, since warmer air can hold more water vapor. But you still need a low pressure system to come along and wring that moisture out of the air to get rain. When natural fluctuations in jet stream patterns take storms away from a region, creating a drought, the extra water vapor in the air won’t do you any good. There will be no mechanism to lift the moisture, condense it, and generate drought-busting rains. The drought that ensues will be more intense, since temperatures will be hotter and the soil will dry out more.

Figure 2. Weather Whiplash in Georgia, 2013: the center of the state was in exceptional drought as the beginning of the year, but heavy rains in February, March, and April busted the drought. Heavy May rains have now brought flooding. Image credit: U.S. Drought Monitor.

Weather Whiplash in the Southeast U.S. more likely due to an intensification of the Bermuda High
This year’s “Weather Whiplash” in Georgia is the second time in the past decade the state has gone from exceptional drought to flood. In September 2007, Atlanta, Georgia was in the midst of a 1-in-100 year drought, and was just weeks away from running out of water. Yet just two years later, the drought had been busted, and a phenomenal 1-in-500 year flood ripped through the city, killing ten and causing $500 million in damage. According to a 2011 study by a Duke University-led team of climate scientists, “Changes to the North Atlantic Subtropical High and Its Role in the Intensification of Summer Rainfall Variability in the Southeastern United States”, the frequency of abnormally wet or dry summer weather in the southeastern United States has more than doubled in recent decades, due to an intensification of the Bermuda High. The scientists found that the Bermuda High, which is centered several hundred miles to the east of the Southeast U.S., has grown more intense during summer and has expanded westwards over the past 30 years. Since high pressure systems are areas of sinking air that discourage precipitation, this has made abnormally dry summers more common over the Southeast U.S. However, in summers when the Bermuda High happens to shift to the east, so that high pressure is not over the Southeast U.S., the stronger winds blowing clockwise around the Bermuda High bring an increased flow of very moist subtropical air from the south to the Southeast U.S., increasing the incidence of abnormally wet summers. Thus, the intensification of the Bermuda High has made extreme droughts and extreme floods more likely over the Southeast U.S. Using climate models, the scientists determined that human-caused global warming was likely the main cause of the significant intensification in the Bermuda High. Thus “Weather Whiplash” between drought and flood will probably become increasingly common in the coming decades over the Southeast U.S.

Figure 3. Observed June-July-August departure of precipitation from average over the SE United States for a 60-yr period (mm day−1). Horizontal dashed lines represent 1 standard deviation of the summer rainfall. Note that summer precipitation extremes exceeding one standard deviation have more than doubled during the most recent 30-year period compared to the previous 30-year period. Image credit: Li et al., 2011, Journal of Climate.

– Jeff Masters is the co-founder of the Weather Underground. This piece was originally published at the Wunderblog and was excerpted with permission.

New Orleans post-Katrina. Credit: NOAA.

By Dana Nuccitelli via Skeptical Science

The link between human-caused global warming and extreme weather is often difficult to pin down, particularly with regards to hurricanes.  As Kevin Trenberth has discussed, all weather now occurs in a climate that humans have altered:

“It is important to recognize that we have a ‘new normal’, whereby the environment in which all storms form is simply different than it was just a few decades ago.  Global climate change has contributed to the higher sea surface and sub-surface ocean temperatures, a warmer and moisteratmosphere above the ocean, higher water levels around the globe, and perhaps more precipitation in storms.”

Two new papers have recently been published examining the link between global warming and hurricane intensity.  In both cases, the scientists have found evidence that the most intense hurricanes are already occurring more often as a result of human-caused global warming.  However, their predictions about future hurricane changes differ somewhat.

Grinsted on Hurricane Storm Surges

Last year, Tamino examined Grinsted et al. (2012), which demonstrated that the most extreme storm surge events can mainly be attributed to large landfalling hurricanes, and that those events are strongly linked to hurricane damage.  The study also found that there have been twice as many Katrina-magnitude storm surge events in globally warm years as compared to cold years.

In a new paper, Grinsted et al. (2013) constructed a storm surge index beginning in 1923 from six long tide gauge records in the southeastern USA.  The idea is that surges in sea level recorded at tide gauge stations can tell us about strong hurricane events.  Consistent with their 2012 results, the authors found:

“The strong winds and intense low pressure associated with tropical cyclones generate storm surges. These storm surges are the most harmful aspect of tropical cyclones in the current climate, and wherever tropical cyclones prevail they are the primary cause of storm surges.”

They compared their storm surge index to changes in global surface temperature, to temperatures in the Main Development Region (MDR; a part of the Atlantic Ocean where most hurricanes form), and to MDR warming relative to the tropical mean temperatures (rMDR).  They found that averaged sea surface temperatures over the MDR are the best predictor of Atlantic cyclone activity, followed by global average surface temperature, with MDR warming relative to the tropics being the worst predictor of hurricane activity (Figure 1).

Figure 1: (A) Average surge index over the cyclone season. (B) Observed frequency of surge events with surge index greater than 10 units per year (surge index > 10 units). (C) Global average temperature, MDR temperature, and rMDR temperature anomaly. Inset shows locations along the US coast of the six tide gauges used in the surge index.

Grinsted et al. then used the relationships between hurricane storm surges and global and MDR temperatures to predict how storm surges will change in the future.  They used the Representative Concentrations Pathway (RCP) 4.5 scenario, which represents a future in which we slowly reduce human greenhouse gas emissions such that they peak around the year 2040.  In this scenario, there is approximately 2.4°C global surface warming over the 21st century.  The results are shown in Figure 2.

“The response to a 1°C warming is consistently an increase [in Katrina-levelstorm surges] by a factor of 2–7…. This increase does not include the additional increasing surge threat from sea level rise.”

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A new public opinion survey finds nearly two thirds of Americans say the weather has gotten worse in recent years.

The survey by Yale and George Mason Universities, “Extreme Weather and Climate Change in the American Mind April 2013” also found that nearly six in ten understand that global warming is affecting our weather.

Last month, Gallup’s polling confirmed that the public’s understanding and concern about global warming is on the rise. In February, a poll released by the Brookings Institution showed a 7 percent increase in the number of Americans who say that the planet is warming — with that increase influenced by extreme weather events.

This isn’t really so surprising given that the last two years have brought a stunning series of extreme weather events: two record heat waves, an historic drought, above-average destructive wildfires, and two powerful hurricanes that slammed into the East Coast. In 2012, the U.S. experienced the most extreme year for weather ever recorded, according to NOAA’s Climate Extremes Index.

The world’s largest reinsurance firm, Munich Re, released a report in October concluding that the growing number of weather extremes are a “strong indication of climate change”:

“Climate­-driven changes are already evident over the last few decades for severe thunderstorms, for heavy precipitation and flash flood­ing, for hurricane activity, and for heatwave, drought and wild­-fire dynamics in parts of North America.”

“In all likelihood, we have to regard this finding as an initial climate-change footprint in our US loss data from the last four decades. Previously, there had not been such a strong chain of evidence. If the first effects of climate change are already perceptible, all alerts and measures against it have become even more pressing,” said Peter Höppe, the head of Munich Re’s Geo Risks Research unit.

At the same time, non-climatic events (earthquakes, volcanos, tsunamis) have hardly changed, as the figure shows.

So our weather is getting more extreme, thanks in large part to climate change and, NOAA’s latest research confirms, to warming-driven Arctic ice loss as well. And the public has noticed. Now we just need our political leadership to notice.

Bowling Green Subway Station in New York, October 30, 2012, closed after Superstorm Sandy hit. (Credit: AP)

Scroll to the end of this post for an excellent infographic on this topic.

Superstorm Sandy devastated New Jersey, New York, and other areas along the eastern seaboard six months ago on October 29, 2012. It took at least 72 lives in the United States and caused nearly $50 billion in damages. Congress eventually provided $60 billion in disaster relief and recovery aid after weeks of deliberating and partisan bickering. These recovery efforts continue to this day.

Sandy was the worst natural disaster in the United States in terms of destruction and deaths since Hurricanes Katrina and Rita in 2005, but it wasn’t the only one. In 2011 and 2012 alone, the United States experienced 25 floods, storms, droughts, heat waves, and wildfires that each caused at least $1 billion in damages. Combined, these extreme weather events were responsible for 1,107 fatalities and up to $188 billion in economic damages.

The Center for American Progress conducted an analysis and found that the federal government—which means taxpayers—spent $136 billion total from fiscal year 2011 to fiscal year 2013 on disaster relief. This adds up to an average of nearly $400 per household per year.

Nearly all of this disaster spending was for relief and recovery from these and other smaller natural disasters. Most of these disasters are symptomatic of the man-made climate change resulting from massive amounts of carbon emissions and other pollutants in the atmosphere, which warm the oceans and the Earth. As climate change accelerates, so will federal spending on disaster relief and recovery, which will ultimately be paid for by taxpayers.

The nearly $400 per household spent annually over the past three years could be the beginning of a very costly future as climate-related extreme weather multiplies. This issue brief explores federal spending on disaster relief and offers up recommendations for how we can respond to the potential growth in these expenditures.

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Daniel J. Weiss is a Senior Fellow and Director of Climate Strategy at the Center for American Progress. Jackie Weidman is a Special Assistant on the Energy team at the Center. The authors would like to thank Cathleen Kelly, Senior Fellow, Mari Hernandez, Research Associate, and Mayhah Suri, intern, all at the Center, for their contributions to this analysis. This piece was reposted from CAP.

A 2010 study found “global warming is the main cause of a significant intensification in the North Atlantic Subtropical High that in recent decades has more than doubled the frequency of abnormally wet or dry summer weather in the southeastern United States.” Below, meteorologist Dr. Jeff Masters relates how wild climate swings are becoming the norm in the Midwest, too.–JR

Runoff from heavy rains flooded parts of a cemetery in St. Louis County on April 18, 2013. (Photo credit: Robert Cohen)

By Jeff Masters, via Weather Underground

It seems like just a few months ago barges were scraping bottom on the Mississippi River, and the Army Corps of Engineers was blowing up rocks on the bottom of the river to allow shipping to continue. Wait, it was just a few months ago–less than four months ago! Water levels on the Mississippi River at St. Louis bottomed out at -4.57′ on January 1 of 2013, the 9th lowest water level since record keeping began in 1861, and just 1.6′ above the all-time low-water record set in 1940 (after the great Dust Bowl drought of the 1930s.)

But according to National Weather Service, the exceptional April rains and snows over the Upper Mississippi River watershed will drive the river by Tuesday to a height 45 feet higher than on January 1. The latest forecast calls for the river to hit 39.4′ on Tuesday, which would be the 8th greatest flood in history at St. Louis, where flood records date back to 1861. Damaging major flooding is expected along a 250-mile stretch of the Mississippi from Quincy, Illinois to Thebes, Illinois next week.

At the Alton, Illinois gauge, upstream from St.Louis, a flood height of 34′ is expected on Tuesday. This would be the 6th highest flood in Alton since 1844, and damages to commercial property in the town of Alton occur at this water level. In addition, record flooding is expected on at least five rivers in Illinois and Michigan over the next few days. A crest 1.5′ above the all-time record has already occurred on the Des Plaines River in Chicago. This river has invasive Asian Carp that could make their way into Lake Michigan if a 13-mile barrier along the river fails during an extreme flood. Fortunately, NPR in Michigan is reporting today that U.S. Army Corps of Engineers crews stationed along the 13-mile Asian carp barrier have seen no evidence of the fish breaching the structure, and it would have taken a flood much larger than today’s record flood to breach the structure. A crest on the Grand River in Grand Rapids, Michigan nearly 4′ above the previous record (period of record: at least 113 years) is expected this weekend. At this flood level, major flooding of residential areas is expected, though the flood wall protecting downtown Grand Rapids will keep the commercial center of the city from flooding.

Figure 1. The rains that fell in a 24-hour period ending at 7 am EDT Thursday, April 18, 2013 over Northern Illinois were the type of rains one would expect see fall only once every 40 years (yellow colors), according to METSTAT, Inc. (http://www.metstat.com.) METSTAT computed the recurrence interval statistics based on gauge-adjusted radar precipitation and frequency estimates from NOAA Atlas 14 Volume 2, published in 2004 (http://dipper.nws.noaa.gov/hdsc/pfds/.) METSTAT does not supply their precipitation recurrence interval forecasts or premium analysis products for free, but anyone can monitor the real-time analysis (observed) at: http://metstat.com/solutions/extreme-precipitation-index-analysis/

Damages from the April 2013 Midwest U.S. flood in Illinois, Michigan, and Missouri are likely to run into the hundreds of millions of dollars. Some of the impacts at the flood levels predicted include:

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Source: Environment America

The vast majority of Americans have experienced a weather-related disaster in the past six years, according to a report released today by the Environment America Research and Policy Center.

The report, which is based on disaster declaration data from the Federal Emergency Management Agency, found that 243 million Americans — nearly four out of five — have lived in a county that has been hit by at least one federally declared weather-related disaster since 2007. The breadth and impact of these disasters, which include drought, tropical cyclones, flooding, tornadoes, wildfires and snow and ice storms, has been significant. According to the report:

• Every U.S. state besides South Carolina has experienced a weather-related disaster since 2007, and in 18 states and the District of Columbia, weather-related disasters have affected every county.
• More than 19 million Americans live in counties that have averaged one or more weather disaster per year since 2007.
• In 2012 alone, there were at least 11 disasters that caused more than $1 billion in damage, including Hurricane Sandy, which, with a price tag as high as $70 billion, was the costliest weather-related disaster in the U.S. since Hurricane Katrina.
• Eight U.S. counties in South Dakota, Oklahoma and Nebraska have been hit by ten or more weather disasters since the beginning of 2007.

The report notes that the frequency and intensity of several weather-related disasters has increased over the last several years and is predicted to continue increasing as the climate warms. Intense rainfall, for instance, has become more frequent in the U.S., with “the rainiest 1 percent of all storms delivering 20 percent more rain on average at the end of the 20th century than at the beginning,” and this increase is predicted to continue. And it’s likely the record-breaking heat waves, drought and wildfires that have gripped the country in the last few years will also become more common as the planet warms. The link between tornadoes and climate change is more tenuous and complicated (see here).

The report is in line with other studies of its kind — in February, a report from the Center for American Progress found that in 2011 and 2012, 43 states experienced extreme weather events that caused at least $1 billion in damage, and these events caused 1,107 fatalities and up to $188 billion in damage in total. To slow the increase of many kinds of extreme weather events, the Environment America report calls on federal and state governments to implement caps on greenhouse gases — especially on high-emitting sources, such as power plants and the transportation sector — and adopt goals of reducing emissions by at least 35 percent below 2005 levels by 2020 and at least 85 percent by 2050.