U.S., Mediterranean face extreme warming. A global 2C (3.6 Fahrenheit) rise above mid-19th century levels would mean a jump of at least 3.0C (5.4F) in maximum daytime temperatures in these regional hot spots -- deep into the red zone of dire climate impacts

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U.S., Mediterranean face extreme warming. A global 2C (3.6 Fahrenheit) rise above mid-19th century levels would mean a jump of at least 3.0C (5.4F) in maximum daytime temperatures in these regional hot spots -- deep into the red zone of dire climate impacts