Heat Advisory

Locations Affected

Portland, OR ∙ Vancouver, WA ∙ Salem, OR ∙ Gresham, OR ∙ Hillsboro, OR ∙ Beaverton, OR ∙ Albany, OR ∙ Hood, WA ∙ Aloha, OR ∙ Portland Intl Airport, OR

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Portland OR 1047 AM PDT Tue Jul 21 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PDT WEDNESDAY... * WHAT...High temperatures up to 100. * WHERE...Greater Portland/Vancouver Metro, Western and Central Columbia River Gorge and the Hood River Valley, Lower Columbia River and Cowlitz River Valleys, and Central Willamette Valley. * WHEN...Until 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. Around a 10-15% chance of thunderstorms on Wednesday afternoon which may increase cloud cover and thus cause temperatures to be slightly lower than 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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