Weather Alerts For Hillsboro, OR

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT FROM 11 AM SUNDAY TO 11 PM PDT TUESDAY # DETAILS -------------------- WHAT Dangerously hot conditions with temperatures of 95 to 99 degrees F expected. WHERE Portland Metro Lowlands, Western Columbia River Gorge, Portland West Hills and Chehalem Mountain, Inner Vancouver Metro, and East Clark County Lowlands. WHEN From 11 AM Sunday to 11 PM PDT Tuesday. IMPACTS Heat related illnesses increase significantly during extreme heat events. ADDITIONAL DETAILS Peak heating days will be Sunday and Monday with a slight cool down on Tuesday. Overnight temperatures will remain elevated Sunday night into Monday morning, and Monday night into Tuesday morning. Night time temperatures ranging from 63 to 67 degrees F will lead to poor overnight relief. There is currently a 15-30% chance that night time temperatures remain above 70 degrees F Sunday night into Monday morning, and less than a 10% chance Monday night into Tuesday morning. There is a 30-40% chance of high temperatures of 100 degrees F or more on Monday. ISSUED AT Friday, June 12, 2026 at 10:36 AM PDT ISSUED BY National Weather Service Portland OR HEADER URGENT - WEATHER MESSAGE # 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. 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. Stay cool, stay hydrated, stay informed. Monitor the latest forecasts and warnings for updates. If you do not have air conditioning in your home or lack shelter, you can call 211 for assistance locating appropriate shelter from the heat. # AREAS AFFECTED -------------------- 84 Corridor, East Clark County Lowlands, East Portland Metro, Inner Portland Metro, Inner Vancouver Metro, Portland West Hills and Chehalem Mountain, Tualatin Valley, West Columbia River Gorge I, West Columbia River Gorge SR 14 Corridor Including the cities of Tigard, Cascade Locks, Rooster Rock, Hillsboro, Sylvan Hill, Cape Horn, Salmon Creek, Bonneville, North Bonneville, Stevenson, Gresham, Evergreen, Rockcreek, Camas, Washougal, Sellwood, Beacon Rock SP, Sherwood, Fairview, Troutdale, Multnomah Falls, Vancouver, Oregon City, Portland, Skyline Drive, Chehalem Mountain, Forest Grove, Happy Valley, Lake Oswego, and Eagle Creek

Pollen Index: 9 Pollen Level: medium-high Predominant Pollen: Grass and Walnut. Pollen concentrations for Saturday will be increasing in the high range. This rise is a result of rising temperatures, strong winds and lower relative humidity.