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Dangerous heat, isolated storms, then Canadian wildfire smoke

Heat and humidity peak Wednesday with heat index values near 104°F; a cold front may bring isolated storms before Canadian wildfire smoke filters in Wednesday night, causing poor air quality through Thursday and possibly into the weekend.

Published Jul 15, 2026, 8:55 AM EDT | LehighValleyLive

Dangerously hot and humid conditions will peak Wednesday across the Lehigh Valley, with heat index values reaching 104 degrees.