This Summer of Extreme Weather Features Flash Floods and Corn Sweat

image via New Scientist

July 30, 2025, 10:00 AM

• •Flash floods occur quickly due to intense rainfall in a small area, exacerbated by impermeable surfaces and topography.
• •Corn sweat, a term for high humidity in the Midwest, results from crops transpiring water vapor during heat waves.
• •To stay safe during extreme heat, avoid strenuous activity, stay hydrated, wear light clothing, seek shade, and utilize air conditioning or fans.
• •Weather models cannot accurately predict flash floods.

This article discusses extreme weather events, focusing on flash floods and corn sweat. Flash floods are caused by intense rainfall over a small area, especially in areas with a lot of pavement and riverbeds. Corn sweat, high humidity in the Midwest, is due to crops releasing water vapor. The article also offers advice on how to stay cool and safe during extreme weather.

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