NEW YORK, Aug. 6 (UPI) -- An increase in extreme heat events since the mid-20th century has been linked to overall climate warming, U.S. researchers say.
A statistical analysis by NASA scientists suggests the recent bouts of extremely warm summers, including the intense heat wave afflicting the U.S. Midwest this year, are very likely the consequence of global warming, the space agency's Goddard Institute for Space Studies in New York said in a release Monday.