Linn County, OR

Alerts

Advisory Area
County Line

Alerts are listed in order of start time and level of severity. Click on the alert title to read details for each alert.

In effect from Tuesday 07/21 10:47 AM PDT – Tuesday 07/21 11:00 PM PDT

Issued by NWS Portland OR

What

High temperature today of 95 to 98 degrees F.

Where

Cascade Foothills of Marion and Linn Counties and Linn County Lowlands.

When

Until 11 PM PDT this evening.

Impacts

Hot temperatures may cause heat illnesses.

Additional Details

Smoke from area fires and incoming cloud cover may reduce temperatures in some locations. However, there remains a high probability of temperatures meeting Major HeatRisk today. This is especially true within the valleys.

What to Do

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.
Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.


Areas Impacted

  • Linn County Lowlands
  • Cascade Foothills of Marion and Linn Counties

Tips to Stay Safe

A Heat Advisory means dangerous heat conditions are happening now or soon. Take action before, during and after the heat to stay safe. 

  • Stay in air-conditioned spaces if possible. Find cooling centers or places with AC in your community that you can go to, like libraries or shopping malls. 
  • Stay hydrated and stock up on clean drinking water to get you through multiple days of heat.
  • Reschedule outdoor activities for cooler times of the day, and take breaks in the shade or air conditioning.
  • Cover windows with curtains or shades, or use window reflectors designed to reflect heat back outside. 
  • Check on friends, family, and neighbors, especially those who do not have air conditioning or spend much of their time alone. 

Make sure you know the signs of heat-related illness and how to respond.

Briefings

No recent briefing available

From the Forecaster

Heat Advisory

Created by the NWS Portland WFO

A Heat Advisory has been issued for portions of the interior lowlands of NW OR & SW WA for Tuesday through Wednesday. Forecast for your location ➡️ http://weather.gov/portland Heat safety tips ➡️ http://weather.gov/safety/heat

Heat Advisory 10 AM Tuesday, July 21 through 11 PM Wednesday, July 22, 2026. WHAT: High temperatures as high as 95 to 100 degrees. Moderate to Major HeatRisk - this level of heat can impact most individuals, especially those sensitive to heat. WHERE: Portland/Vancouver Metro, Willamette Valley, Tualatin Valley, Southwest Washington Lowlands & Foothills, Western and Central Columbia River Gorge. PREPAREDNESS ACTIONS: Avoid strenuous outdoor activities during the day if possible. Stay hydrated & take frequent breaks from the heat. Find locations with air conditioning. Check on those sensitive to the heat. Beware of cold water shock: wear personal flotation devices when swimming in local rivers and lakes.

Seven-day Weather Risk Overview

The graphic shows the daily risk summary for 7 days. Daily risk is based on highest risk factor for that day.

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