Cowlitz County under heat warning through Monday night

The National Weather Service issued a heat warning through midnight Monday for Southwest Washington and northern Oregon, including Cowlitz County.

Temperatures of 93-98 Fahrenheit are expected. The warning stated that Monday is set to be the hottest day of the week, with temperatures cooling down on Tuesday.

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The high on Tuesday is forecasted to be 75 degrees in Longview-Kelso, then 78 degrees on Wednesday and 86 degrees on Thursday.

The National Weather Service advised people in the expected area to drink plenty of fluids, stay in cool places out of the sun and check up on relatives and neighbors. Those without air conditioning can use fans to keep air circulating and open their windows at night to let in cool air.

While outside, people were advised to wear lightweight, loose-fitting clothing and limit strenuous activity to the early morning or evening.

Young children and pets should not be left in unattended vehicles, as car interiors can reach lethal temperatures in a matter of minutes.

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This story was originally published June 16, 2026 at 6:20 PM.