Summary
WASHINGTON - America in recent years has been sweltering through three times more than its normal share of extra-hot summer nights, government weather records show. And that is a particularly dangerous trend.
During heat waves, like the one that now has a grip on much of the East, one of the major causes of heat deaths is the lack of night cooling that would normally allow a stressed body to recover, scientists say.See the full content of this document
Extract
Hot Nights On the Rise
Some scientists say the trend is a sign of man-made global warming.
A top fe...See the full content of this document
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