Heat Advisory

Locations Affected

Portland, OR ∙ Salem, OR ∙ Vancouver, WA ∙ Gresham, OR ∙ Hillsboro, OR ∙ Beaverton, OR ∙ Ridgefield National Wildlife Refuge, WA ∙ Gervais, OR ∙ West Linn, OR ∙ Four Corners, OR

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Portland OR 901 PM PDT Mon Jul 20 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TUESDAY TO 11 PM PDT WEDNESDAY... * WHAT...Temperatures as high as 95 to 100 expected. * WHERE...Western and Central Columbia River Gorge and the Hood River Valley, Portland Metro Lowlands, Greater Vancouver Metro, Lower Columbia River and Cowlitz River Valleys, and East Central Willamette Valley. * WHEN...From 10 AM Tuesday to 11 PM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Smoke from fires outside of the region or clouds moving into the area could result in cooler daytime high temperatures than currently forecast. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in a cool place during the heat of the day, stay out of the sunshine, and check up on relatives and neighbors. For those without air conditioning, use fans to keep air moving. Keeps windows closed during the day and open at night, unless air quality is degraded due to wildfire smoke. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

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