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Interactive Map: Daily Maximum Wet-Bulb Temperature

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A new study shows that extreme, sometimes potentially fatal, mixtures of heat and humidity are emerging across the globe. The interactive world map below shows documented instances, with hotter colors from yellow to red signifying the worst combinations as measured on the Centigrade “wet bulb” scale. Read the full story: “Potentially Fatal Combinations of Humidity and Heat Are Emerging Across the Globe. (Map: Jeremy Hinsdale; adapted from Raymond et al., Science Advances, 2020; updated May, 2025)

Usage: Use trackpad or buttons to zoom, drag and drop to move; zoom in to view data points; click points to view temperature and location information.

< 17.75 20 22.25 24.5 26.75 29 31.25 33.5 >
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