Record-breaking extreme weather.

The World Meteorological Organization reports that temperature measurements from early 2007 indicate the warmest period ever recorded:

In January and April 2007 it is likely that global land surface temperatures ranked warmest since records began in 1880, 1.89°C warmer than average for January and 1.37°C warmer than average for April. Several regions have experienced extremely heavy precipitation, leading to severe floods. The Fourth Assessment Report of the WMO /UNEP Intergovernmental Group on Climate Change (IPCC) notes an increasing trend in extreme events observed during the last 50 years. IPCC further projects it to be very likely that hot extremes, heat waves and heavy precipitation events will continue to become more frequent.