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Imagine heat waves like the one last July coming more often & lasting longer: that’s the projection from climate models for the middle of this century based on one future emissions path.

Deke Arndt, Chief of the Climate Monitoring Branch at NOAA’s National Climatic Data Center talks about the unusual heat in May 2012.

NCDC climate scientist Deke Arndt talks about the record March heat and the cumulative effect of a warm fall, winter, and early spring on “heating degree days”—an estimate of the energy demand during the U.S. cold season.

Temperature anomaly map

Record and near-record breaking temperatures dominated the eastern two-thirds of the nation and contributed to the warmest March in the contiguous United States since records began in 1895. The average temperature was 8.6 degrees above the 20th century average for March. In the past 117 years, only one month (January 2006) has ever been so much warmer than its average temperature.

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