Back to today’s briefing

Story perspectives

90 Million Sizzle Under Extreme Heat Dome

7/23/2025

28 4

Summary

Story summary

A relentless heat dome is gripping the central and eastern U.S., impacting over 90 million people with sweltering temperatures. In cities like Chicago and St. Louis, the oppressive humidity, intensified by "corn sweat," is driving heat index values to a staggering 110-115°F. Relief may finally arrive by Friday as storms are forecasted.

History

Historical Context

The 1936 North American heat wave, part of the Dust Bowl era, resulted in over 5,000 deaths as temperatures soared above 100°F in states like Illinois and Missouri. This extreme weather pattern has resurfaced, with a current heat dome affecting over 90 million people, including cities like Chicago and St. Louis, highlighting the urgent need for climate resilience strategies.

1 of 2

Story summary

A relentless heat dome is gripping the central and eastern U.S., impacting over 90 million people with sweltering temperatures. In cities like Chicago and St. Louis, the oppressive humidity, intensified by "corn sweat," is driving heat index values to a staggering 110-115°F. Relief may finally arrive by Friday as storms are forecasted.

1 / 2