BBC: The last year in the continental US has been the country's hottest since modern record-keeping began in 1895, say government scientists.
The National Oceanic and Atmospheric Administration (NOAA) also said the US had broken its record for the hottest six months in a calendar year.
One of the agency's weather experts suggested climate change was playing a role in the hot temperatures.
A recent 11-day heatwave in the US has claimed at least 46 lives.
A cold front moved in to the US Midwest......
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US has hottest year since 1895, say scientists
Posted by Washington Post: Juliet Eilperin on July 9th, 2012
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