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* WHAT...Dangerously hot conditions with high temperatures up to 93-98F and overnight low temperatures of 60-68F possible. * WHERE...South Washington Cascades and the Northern and Central Cascades of Oregon, North and Central Coast Range Valleys of Oregon, and Willapa and Wahkiakum Lowlands. * WHEN...Until 5 AM PDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events, especially for those spending time outdoors or without access to adequate cooling. * ADDITIONAL DETAILS...Friday and Saturday will be the hottest days. Overnight lows as warm as the lower 70s are possible on the mid slopes of the Cascades.

* WHAT...Dangerously hot conditions with high temperatures up to 93-98F and overnight low temperatures of 60-68F possible. * WHERE...North and Central Coast Range Mountains of Oregon, and Willapa Hills. * WHEN...Until 5 AM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events, especially for those spending time outdoors or without access to adequate cooling. * ADDITIONAL DETAILS...Friday and Saturday will be the hottest days.

* WHAT...Very hot conditions with high temperatures of 100 to 107 degrees expected. Overnight low temperatures of 60 to 70 degrees. * WHERE...The valleys of Josephine and Jackson Counties. This includes Agness, Grants Pass, Cave Junction, Williams, Ruch, Rogue River, Gold Hill, White City, Shady Cove, Medford, Jacksonville, Talent and Ashland. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Unusually hot temperatures will increase risk for heat related illnesses. Warm overnight temperatures will provide little relief from hot daytime temperatures.

* WHAT...Hot conditions with high temperatures of 95 to 104 degrees expected. Overnight low temperatures of 55 to 65 degrees. * WHERE...The valleys of central and eastern Douglas County. This includes Camas Valley, Elkton, Drain, Sutherlin, Roseburg, Glendale, Riddle, Canyonville, Tiller and Toketee Falls. * WHEN...Until 8 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat related illnesses.

* WHAT...Hot conditions with high temperatures of 95 to 100 degrees expected. Overnight low temperatures of 50 to 65 degrees. * WHERE...In Oregon, all areas from the Cascades and Siskiyou Mountains eastward, including Union Creek, Lake of the Woods, Fish Lake, Howard Prairie, Klamath Falls, Chiloquin, Crescent, Fort Rock, Bly and Lakeview. In California, eastern Siskiyou County and all of Modoc County, including Dorris, Macdoel, Tulelake, Adin, Alturas and Likely. * WHEN...Until 8 PM PDT Saturday. * IMPACTS...Hot temperatures may cause heat related illnesses.

The National Weather Service in Seattle has issued a Red Flag Warning for hot, dry and unstable conditions, which is in effect from 5 AM Saturday to 9 PM PDT Sunday. A new Fire Weather Watch has also been issued, which is in effect from Monday afternoon through Tuesday evening. Hot, dry, and unstable conditions may continue into Monday and Tuesday. * AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North Cascades Generally above 1500 Feet and Fire Weather Zone 659 West Slopes of the Central Cascades Generally above 1500 Feet. * RELATIVE HUMIDITY...As low as 15 to 25 percent. * TEMPERATURES...Up to 90 to 100. * STABILITY...Unstable conditions can be expected. * 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 5 AM Saturday to 9 PM PDT Sunday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 661 East Portion of the Olympic Mountains. * RELATIVE HUMIDITY...As low as 20 to 25 percent. * TEMPERATURES...Up to 90. * STABILITY...Unstable conditions can be expected. * 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 5 AM Saturday to 9 PM PDT Sunday. A new Fire Weather Watch has also been issued, which is in effect from Monday afternoon through Tuesday evening. Hot, dry, and unstable conditions may continue into Monday and Tuesday. * AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North Cascades Generally above 1500 Feet and Fire Weather Zone 659 West Slopes of the Central Cascades Generally above 1500 Feet. * RELATIVE HUMIDITY...As low as 15 to 25 percent. * TEMPERATURES...Up to 90 to 100. * STABILITY...Unstable conditions can be expected. * 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 high temperatures ranging from the mid 80s to 90s expected and low temperatures mostly in the 60s. This will pose a moderate risk of heat-related illness. * WHERE...Portions of northwest and west central Washington. * WHEN...Until 5 AM PDT Tuesday. * 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 high temperatures ranging from the mid 80s to 90s expected and low temperatures mostly in the 60s. This will pose a moderate risk of heat-related illness. * WHERE...Lake Crescent Area Including US 101. * WHEN...Until 5 AM PDT Tuesday. * 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 high temperatures ranging from the upper 80s to upper 90s and low temperatures mostly in the 60s. This will pose a major risk of heat-related illness. * WHERE...Foothills and Valleys of the North Cascades, Foothills and Valleys of Central King County, Foothills and Valleys of Pierce and Southern King Counties, Foothills and Valleys of Snohomish and Northern King Counties, and Foothills and Valleys of Thurston and Lewis Counties. * WHEN...Until 5 AM PDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

* WHAT...Hot conditions with high temperatures ranging from the upper 80s to mid 90s and low temperatures in the mid 60s. This will pose a major risk of heat-related illness. * WHERE...City of Seattle, Eastside, and Lowlands of Pierce and Southern King Counties. * WHEN...Until 5 AM PDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

* WHAT...Dangerously hot conditions with temperatures up to 98 to 104 degrees expected. This will pose a major to locally extreme risk of heat-related illness. * WHERE...Portions of north central and northeast Oregon and central, south central, and southeast Washington. * WHEN...From noon Saturday to 9 PM PDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...An alternative scenario is lingering cloud cover from possible thunderstorms from southern Oregon may result in lower than forecast afternoon temperatures or higher than forecast overnight low temperatures.

* WHAT...Hot conditions with temperatures 95 to 100 degrees expected. This will pose a moderate to locally major risk of heat-related illness. * WHERE...In Oregon, Central Oregon, John Day Basin, and Grande Ronde Valley. In Washington, Northwest Blue Mountains. * WHEN...From noon Saturday to 9 PM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...An alternative scenario is lingering cloud cover from possible thunderstorms from southern Oregon may result in lower than forecast afternoon temperatures or higher than forecast overnight low temperatures.

* WHAT...Hot conditions with temperatures up to 95 degrees expected. This will pose a moderate risk of heat-related illness. * WHERE...East Slopes of the Oregon Cascades and Wallowa County. * WHEN...From noon Saturday to 9 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...An alternative scenario is lingering cloud cover from possible thunderstorms from southern Oregon may result in lower than forecast afternoon temperatures or higher than forecast overnight low temperatures.

* WHAT...Hot conditions with temperatures 95 to 100 degrees expected. This will pose a moderate to locally major risk of heat-related illness. * WHERE...In Oregon, Central Oregon, John Day Basin, and Grande Ronde Valley. In Washington, Northwest Blue Mountains. * WHEN...From noon Saturday to 9 PM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...An alternative scenario is lingering cloud cover from possible thunderstorms from southern Oregon may result in lower than forecast afternoon temperatures or higher than forecast overnight low temperatures.

* WHAT...Dangerously hot conditions with temperatures up to 98 to 104 degrees expected. This will pose a major to locally extreme risk of heat-related illness. * WHERE...Portions of north central and northeast Oregon and central, south central, and southeast Washington. * WHEN...From noon Saturday to 9 PM PDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...An alternative scenario is lingering cloud cover from possible thunderstorms from southern Oregon may result in lower than forecast afternoon temperatures or higher than forecast overnight low temperatures.

The Oregon Department of Environmental Quality, and the Lane Regional Air Protection Agency has issued an Air Quality Advisory, which is IN EFFECT FROM 10 AM SATURDAY TO 8 PM PDT MONDAY. An Air Quality Advisory for Ozone has been issued. High levels of ozone in the lower atmosphere in the region combined with forecasted conditions will cause air quality to reach unhealthy levels at times through Monday evening. Pollutants can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors. Please follow medical advice if you have a heart or lung condition. More information about air quality can be found at: www.orcaa.org www.swcleanair.gov www.oregon.gov/DEQ www.lrapa.org

* WHAT...Hot temperatures. High temperatures 95 to 102 degrees. Limited overnight relief with low temperatures 65 to 74. * WHERE...Othello, Nespelem, Chelan, Plain, Oroville, Entiat, Harrington, Odessa, Badger Mountain Road, Quincy, Mansfield, Bridgeport, Number 2 Canyon, Leavenworth, Conconully, Ritzville, Lapwai, Number 1 Canyon, Lewiston, Creston, Okanogan, Culdesac, Brewster, Methow, Alpowa Summit, Pangborn Airport, Mazama, Coulee City, Lewiston Grade, Grand Coulee, Cashmere, Disautel Pass, Tonasket, Ephrata, Gifford, Wenatchee, Winthrop, Wilbur, Twisp, Waterville, Moses Lake, Pomeroy, Loup Loup Pass, Clarkston, Peck, and Omak. * WHEN...From noon Saturday to 9 PM PDT Wednesday. * IMPACTS...Hot temperatures will increase the risk of heat-related illnesses. Heat of this magnitude affects anyone without cooling and hydration as well as health systems and industries.

* WHAT...Hot temperatures. High temperatures 90 to 99 degrees for elevations below 3500 feet. High temperatures 80 to 89 degrees for elevations above 3500 feet. Limited overnight relief with low temperatures 57 to 65. * WHERE...Post Falls, Kamiah, Soldiers Meadow Road, Peola, Davenport, Worley, Craigmont, Sherman Pass, Anatone, Airway Heights, Boulder Creek Road, Metaline Falls, Colfax, Moscow, Genesee, La Crosse, Metaline, Republic, Tiger, Tekoa, Plummer, Coeur d'Alene, Uniontown, Flowery Trail Road, Cloverland Road, Deer Park, Rosalia, Chewelah, Fruitland, Colville, Newport, Kettle Falls, Springdale-Hunters Road, Chesaw Road, Inchelium, Orin-Rice Road, Oakesdale, Mountain Road, Highway 20 Wauconda Summit, Nezperce, Wauconda, Spokane Valley, Potlatch, Winchester, Rockford, Downtown Spokane, Pullman, Hayden, Northport, Ione, Cheney, and Fairfield. * WHEN...From noon Saturday to 9 PM PDT Wednesday. * IMPACTS...Hot temperatures will increase the risk of heat-related illnesses. Heat of this magnitude affects anyone without cooling and hydration as well as health systems and industries.