開始于: 2026-08-04, 12:06
到: 2026-08-05, 05:00

...CRITICAL FIRE WEATHER CONDITIONS EXPECTED IN THE WESTERN COLUMBIA RIVER GORGE THIS AFTERNOON THROUGH WEDNESDAY EVENING FOR DRY CONDITIONS AND EASTERLY WINDS UP TO 35 MPH... * AFFECTED AREA...In Washington, Fire Weather Zone 636 Western Columbia River Gorge in Oregon and Washington. * WINDS...Northeast 10 to 20 mph with gusts up to 30-35 mph. Winds will be strongest through this afternoon. * RELATIVE HUMIDITY...As low as 15-20 percent. Relative humidity values will be lowest this afternoon and Wednesday afternoon. Poor overnight humidity recoveries are expected with maximum relative humidity values ranging between 35-45%. * IMPACTS...Conditions may be favorable for rapid fire spread which may threaten life and property. Use extra caution with potential ignition sources, especially in grassy areas. Outdoor burning is not recommended.

開始于: 2026-08-04, 12:00
到: 2026-08-05, 03:00

* WHAT...Afternoon high temperatures of 93 to 98 degrees and morning low temperatures of 60 to 65 degrees expected. * WHERE...Portions of northwest and west central Oregon and southwest Washington. * WHEN...Until 11 PM PDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Wildfire smoke continues west of the Cascades over northwest Oregon and southwest Washington, which may limit high temperatures by approximately 1-3 degrees. However, temperatures will still be hot enough to bring an increased risk of heat-related illnesses even if temperatures are dampened a few degrees from smoke.

開始于: 2026-08-04, 11:53
到: 2026-08-05, 12:00

The Southwest Clean Air Agency has continued an Air Quality Advisory, which is in effect until 11 AM PDT Thursday. An Air Quality Advisory for Smoke and Ozone remains in effect. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels due to smoke and ozone at times through 11 AM PDT Thursday. Pollutants in smoke can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. More information about air quality can be found at: www.swcleanair.gov