Scientists and other observers have become alarmed about the increasing frequency of extreme heat paired with high humidity. Our research is designed to come up with the combination of the two, measured as "wet-bulb temperature." Together, heat and humidity put people at greatly increased risk, and the combination gets dangerous at lower levels than scientists previously believed. The answer goes beyond the temperature you see on the thermometer. Globally, Earth likely had its hottest week on modern record in early July. Phoenix broke a record heat streak with 19 straight days with temperatures above 110 F (43.3 C), accompanied by a long string of nights that never got below 90 F (32.2 C), leaving little opportunity for people without air conditioning to cool down. Įxtreme heat has been breaking records across Europe, Asia and North America, with millions of people sweltering in heat and humidity well above "normal" for days on end.ĭeath Valley hit a temperature of 128 degrees Fahrenheit (53.3 degrees Celsius) on July 16 – not quite the world's hottest day on record, but close. Tony Wolf is a postdoctoral researcher in kinesiology at Penn State. candidate in exercise physiology at Penn State and S. Larry Kenney is a professor of physiology, kinesiology and human performance at Penn State Daniel Vecellio is a geographer-climatologist and postdoctoral fellow at Penn State Rachel Cottle is a Ph.D. How to stay safe in the extreme heat gripping the U.S.
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