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Midwest Heat Wave Intensified by Corn Sweat

7/22/2025

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Summary

Story summary

Corn sweat, the process where corn plants release water vapor, is intensifying summer heat in the Midwest. An acre of corn can unleash a staggering 3,000 to 4,000 gallons of moisture daily, raising humidity levels and making heat waves feel unbearable. This week, Illinois and Missouri are grappling with heat indices soaring to a sweltering 115 degrees.

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Story summary

Corn sweat, the process where corn plants release water vapor, is intensifying summer heat in the Midwest. An acre of corn can unleash a staggering 3,000 to 4,000 gallons of moisture daily, raising humidity levels and making heat waves feel unbearable. This week, Illinois and Missouri are grappling with heat indices soaring to a sweltering 115 degrees.