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* AFFECTED AREA...In Oregon, Fire Weather Zone 684 Northern Willamette Valley near the Gorge. In Washington, Fire Weather Zone 633 Clark County Lowlands and Swift Reservoir Region. * WINDS...Northeast 5 to 15 mph with gusts 20 to 25 mph. * RELATIVE HUMIDITY...20 to 30 percent. * 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. * ADDITIONAL DETAILS...Within the Willamette Valley, the Red Flag Warning is specifically for areas around the Portland-Metro area near the entrance to the Columbia River Gorge and from Oregon City northward east of I-5.

The National Weather Service in Portland has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 PM this evening to 11 PM PDT Thursday. * AFFECTED AREA...In Oregon, Fire Weather Zone 688 Mt. Hood National Forest Region, Fire Weather Zone 689 Northern Willamette National Forest and Fire Weather Zone 690 Southern Willamette National Forest. In Washington, Fire Weather Zone 634 Southern Gifford Pinchot National Forest. * WINDS...East 10 to 15 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...20 to 30 percent. * 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.

* AFFECTED AREA...In Oregon, Fire Weather Zone 684 Northern Willamette Valley near the Gorge. In Washington, Fire Weather Zone 633 Clark County Lowlands and Swift Reservoir Region. * WINDS...Northeast 5 to 15 mph with gusts 20 to 25 mph. * RELATIVE HUMIDITY...20 to 30 percent. * 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. * ADDITIONAL DETAILS...Within the Willamette Valley, the Red Flag Warning is specifically for areas around the Portland-Metro area near the entrance to the Columbia River Gorge and from Oregon City northward east of I-5.

The National Weather Service in Portland has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 PM this evening to 10 AM PDT Thursday. * AFFECTED AREA...In Oregon, Fire Weather Zone 686 Northern Oregon Cascade Foothills. * WINDS...East 10 to 15 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...20 to 30 percent. * 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.

* WHAT...Hot conditions with temperatures in the mid 80s to mid 90s expected. This will pose a moderate risk of heat-related illness. * WHERE...Portions of northwest and west central Washington. * WHEN...From 8 AM Thursday to 11 PM PDT Friday. * IMPACTS...Heat will significantly increase the risk of heat-related illnesses for those who are sensitive to heat, especially those without effective cooling or adequate hydration. * ADDITIONAL DETAILS...Localized areas of Major HeatRisk are possible in Cascade Valleys.

* WHAT...Hot conditions with temperatures in the 80s to lower 90s expected. This will pose a moderate risk of heat-related illness. * WHERE...Central Coast, Eastern Strait of Juan de Fuca, North Coast, Western Skagit County, Western Strait of Juan De Fuca, and Western Whatcom County. * WHEN...From 8 AM to 11 PM PDT Thursday. * IMPACTS...Heat will significantly increase the risk of heat-related illnesses for those who are sensitive to heat, especially those without effective cooling or adequate hydration.

* WHAT...Heat index values around 100 expected. * WHERE...In California, Western Siskiyou County. In Oregon, Central Douglas County, Eastern Curry County and Josephine County, Jackson County, and South Central Oregon Coast. * WHEN...From noon Thursday to 10 PM PDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

* WHAT...High concentration of smoke particulates from wildfires * WHERE...Harney and Malheur Counties. * WHEN...UNTIL 2 PM PDT FRIDAY. * IMPACTS...Smoke can irritate the eyes, lungs and worsen some medical conditions. People most at risk to adverse health effects include infants, young children, people with heart or lung disease, older adults, and pregnant women. * ADDITIONAL DETAILS...Smoke levels can change rapidly depending on weather. Check current conditions on the Oregon Smoke Information Blog, DEQ's Air Quality Index, or by downloading the free OregonAIR app on your smartphone.

The National Weather Service in Seattle has issued a Red Flag Warning for hot, dry and unstable conditions, and periods of gusty winds, which is in effect from 11 PM this evening to 11 PM PDT Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 659 West Slopes of the Central Cascades Generally above 1500 Feet. * RELATIVE HUMIDITY...As low as 15 to 20 percent. * TEMPERATURES...Up to 90. * HAINES...Mid-level Haines 6. * WINDS...East to southeast 10 to 15 mph with gusts up to 25 mph early Thursday morning. * TIMING...Easterly winds will pick up late tonight into early tomorrow morning, allowing for the relative humidity to drop quickly. Winds will ease below thresholds Thursday afternoon while dry and unstable conditions will continue through Friday afternoon. * IMPACTS...A combination of a moderate breeze overnight into the early morning hours on Thursday, as well as low relative humidity, and warm temperatures can contribute to rapid rates of spread and down-wind spotting on existing fires. If a fire were to begin, air quality may diminish in the surrounding area. A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In western Washington, significant growth on existing fires takes place under such conditions. If a fire were to begin, air quality may diminish in the surrounding area.

The National Weather Service in Seattle has issued a Red Flag Warning for hot, dry and unstable conditions, which is in effect from 11 AM Thursday to 11 PM PDT Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North Cascades Generally above 1500 Feet. * RELATIVE HUMIDITY...As low as 20 to 25 percent. * TEMPERATURES...Up to 85. * HAINES...Mid-level Haines 6. * IMPACTS...A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In western Washington, significant growth on existing fires takes place under such conditions. If a fire were to begin, air quality may diminish in the surrounding area.

The National Weather Service in Seattle has issued a Red Flag Warning for hot, dry and unstable conditions, which is in effect from 11 PM this evening to 8 PM PDT Thursday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 652 West Portion of the Olympic Mountains and Fire Weather Zone 661 East Portion of the Olympic Mountains. * RELATIVE HUMIDITY...As low as 20 to 25 percent. * TEMPERATURES...Up to 87. * HAINES...Mid-level Haines 6. * IMPACTS...A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In western Washington, significant growth on existing fires takes place under such conditions. If a fire were to begin, air quality may diminish in the surrounding area.

* WHAT...Hot conditions, with temperatures of 90 to 98 degrees in the lower elevations and up to 90 degrees in the mountains. This will pose a moderate to major risk of heat-related illness. * WHERE...Lower Slopes of the Eastern Washington Cascades Crest. * WHEN...From 1 PM Thursday to 9 PM PDT Saturday. * IMPACTS...Heat will significantly increase the risk of heat-related illnesses for those who are sensitive to heat, especially those without effective cooling or adequate hydration.

* WHAT...Hot conditions, with temperatures of 98 to 102 degrees in the lower elevations and 90 to 95 in the mountains. This will pose a moderate to major risk of heat-related illness. * WHERE...Portions of central, north central, and northeast Oregon and central, south central, and southeast Washington. * WHEN...From 1 PM Thursday to 9 PM PDT Saturday. * IMPACTS...Heat will significantly increase the risk of heat-related illnesses for those who are sensitive to heat, especially those without effective cooling or adequate hydration.

* WHAT...Hot conditions with temperatures 90 to 95 degrees expected. This will pose a moderate to major risk of heat-related illness. * WHERE...Ochoco-John Day Highlands and Southern Blue Mountains of Oregon. * WHEN...From 1 PM Thursday to 9 PM PDT Saturday. * IMPACTS...Heat will significantly increase the risk of heat-related illnesses for those who are sensitive to heat, especially those without effective cooling or adequate hydration.

* WHAT...Hot conditions, with temperatures of 98 to 102 degrees in the lower elevations and 90 to 95 in the mountains. This will pose a moderate to major risk of heat-related illness. * WHERE...Portions of central, north central, and northeast Oregon and central, south central, and southeast Washington. * WHEN...From 1 PM Thursday to 9 PM PDT Saturday. * IMPACTS...Heat will significantly increase the risk of heat-related illnesses for those who are sensitive to heat, especially those without effective cooling or adequate hydration.

Oregon Department of Environmental Quality has issued an Air Pollution Advisory...in effect until 5 PM PDT Friday. This air quality advisory covers Lake, Klamath, and Jackson counties due to wildfires burning in the region. The DEQ also expects intermittent smoke in central and eastern Douglas County through this period due to smoke from surrounding fires. The wildfire smoke combined with forecast conditions will cause air quality levels to fluctuate and could be at unhealthy levels. Smoke levels can change rapidly depending on the weather and planned burn operations. Smoke can irritate the eyes and lungs and worsen some medical conditions. People most at risk include infants and young children, people with heart or lung disease, older adults and pregnant people. People can take the following precautions to protect their health: - Follow local burn restrictions to prevent deteriorating air quality. - Avoid strenuous outdoor activity during periods of poor air quality. - People with heart or lung problems and young children are especially vulnerable. These people should stay indoors while smoke levels are high. - Use certified High Efficiency Particulate Air (HEPA) filters in indoor heating, ventilation, cooling and air purification systems. - Avoid using wood-burning stoves and other sources of indoor smoke if possible. For additional information...please visit the web site at https://oregonsmoke.org

Oregon Department of Environmental Quality has issued an Air Quality Advisory..until 2 PM PDT Friday. A Smoke Air Quality Advisory has been issued. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels. 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. For additional information...please visit the Web site at http://www.oregon.gov/DEQ

The National Weather Service in Portland has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 PM this evening to 11 PM PDT Thursday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Washington, Fire Weather Zone 636 Western Columbia River Gorge in Oregon and Washington. * WINDS...East 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...20 to 30 percent. * 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.

The National Weather Service in Portland has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Thursday morning through Thursday evening. * AFFECTED AREA...In Oregon, Fire Weather Zone 684 primarily for the Northern Valley and Fire Weather Zone 686 Northern Oregon Cascade Foothills. In Washington, Fire Weather Zone 633 Clark County Lowlands and Swift Reservoir Region. * WINDS...Northeast 5 to 10 mph gust to 20 mph. * RELATIVE HUMIDITY...20 to 30 percent. * 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.

* AFFECTED AREA...In Oregon, Fire Weather Zone 688 Mt. Hood National Forest Region, Fire Weather Zone 689 Northern Willamette National Forest and Fire Weather Zone 690 Southern Willamette National Forest. In Washington, Fire Weather Zone 634 Southern Gifford Pinchot National Forest and Fire Weather Zone 635 Mt. Adams Ranger District of the Gifford-Pinchot National Forest. * WINDS...East 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 17 percent. * 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.