Increases in extreme humid-heat disproportionately affect populated regions

The world is not only getting hotter but also more humid. New research by Washington State University scientists shows that people living in areas where humid-heat extremes are already a significant hazard are bearing the brunt of the impact.

“We identify a greater increase in population exposure to humid-heat as compared to dry-heat, emphasizing the importance of understanding humidity changes in a warming world,” said study lead author Cassandra Rogers of Washington State University.

Deepti Singh.
Singh

“For example, increases in the occurrence of humid-heat were strongest over populous regions in South and Southeast Asia and the southeastern U.S., where changes in dry-heat frequency, as measured by temperature alone, are small or non-significant,” said study co-author Deepti Singh.

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National Science Foundation