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* WHAT...Hot temperatures with modest overnight relief. Afternoon high temperatures of 90 to 105 degrees. Morning low temperatures in the mid-50s to mid-60s. * WHERE...Lower Slopes of the Eastern Washington Cascades Crest. * WHEN...From noon today to 10 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Moderate to Major HeatRisk (risk of heat-related impacts) is anticipated through the duration of the event.

* WHAT...Dangerously hot conditions with little overnight relief. Afternoon high temperatures of 95 to 110 degrees. Morning low temperatures in the lower 60s to lower 70s. * WHERE...Portions of north central and northeast Oregon and central, south central, and southeast Washington. * WHEN...From noon today to 10 PM PDT Thursday. * IMPACTS...Heat-related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Major to locally Extreme HeatRisk (risk of heat-related impacts) is anticipated through the duration of the event.

* WHAT...Hot temperatures with modest overnight relief. Afternoon temperatures of 95 to 110 degrees. Morning low temperatures in the mid-50s to upper 60s. * WHERE...Central Oregon and John Day Basin. * WHEN...From noon today to 10 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Moderate to Major HeatRisk (risk of heat-related impacts) is anticipated through the duration of the event.

* WHAT...Hot temperatures with modest overnight relief. Afternoon high temperatures of 95 to 110 degrees. Morning low temperatures in the mid-50s to lower 70s. * WHERE...Wallowa County. * WHEN...From noon Monday to 10 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hottest temperatures will be in the canyons of Wallowa County, especially Hells Canyon. Temperatures will be comparatively cooler in Wallowa Valley. Moderate to locally Extreme HeatRisk (risk of heat-related impacts) is anticipated through the duration of the event.

* WHAT...Dangerously hot conditions with high temperatures of 100 to 115 and low temperatures in the upper 60s expected over multiple days. Overnight low temperatures will remain in the mid to upper 60s. * WHERE...In California, western and central Siskiyou County. This includes the cities of Yreka, Weed, Etna, and Happy Camp, Mt Shasta City, and Dunsmuir. In Oregon, Josephine and Jackson counties and eastern Curry County. This includes the entire Rogue Valley and the cities of Medford, Grants Pass, Cave Junction, and Butte Falls. * WHEN...Until 9 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Area rivers will be cold and can cause shock to swimmers. * ADDITIONAL DETAILS...This will be a multi day heat wave with the warmest temperatures on Friday and Saturday. The Medford Airport has a 40% chance to tie or exceed the all time temperature record of 115.

* WHAT...High temperatures of 95 to 100 degrees with lows in the upper 50's expected over multiple days. * WHERE...In California, Modoc County and eastern Siskiyou County. This includes the cities and communities of Macdoel, Tulelake, Pondosa, Bray, Tennant, Dorris Tionesta, Alturas, and Adin. In Oregon, Klamath and Lake Counties. This includes the cities of Klamath Falls, Chemult, Summer Lake, Chiloquin, Malin, Keno, Sprague River, and Lakeview * WHEN...Until 9 PM PDT Monday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Area rivers will be cold and can cause shock to swimmers. * ADDITIONAL DETAILS...This will be a long-duration heatwave with temperatures lingering through at least Monday.

* WHAT...High temperatures between 105 to 110 with low temperatures in the mid to upper 60's expected over multiple days. * WHERE...Central Douglas County and Eastern Douglas County Foothills. This includes the cities of Roseburg, Toketee Falls, Sutherlin. * WHEN...Until 9 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events, particularly for those working or participating in outdoor activities. Area rivers will be cold and can cause shock to swimmers.

* WHAT...Hot conditions with temperatures in the upper 80s and 90s expected. This will pose a moderate to major risk of heat-related illness. * WHERE...Portions of northwest and west central Washington. * WHEN...From noon today to 10 PM PDT Monday. * IMPACTS...This level of heat will significantly increase the risk of heat-related illnesses for much of the population, especially those who are heat sensitive and those without effective cooling or adequate hydration. * ADDITIONAL DETAILS...Temperatures will remain well above normal next week with only gradual cooling expected.

* WHAT...Hot conditions with temperatures in the upper 70s and 80s near the coast. Temperatures in the upper 80s and 90s away from the coast. This will pose a moderate risk of heat-related illness. * WHERE...Central Coast, North Coast, and Western Strait of Juan De Fuca. * WHEN...From noon today to 10 PM PDT Sunday. * 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...Marine air may move into coastal areas Sunday and Monday providing relief. However, well above-normal temperatures will persist inland well into next week.

* 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 20 percent. * TEMPERATURES...Up to 92. * 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...Dangerously hot conditions during the day with little relief overnight. Highs will be in the 90s to 100s. Overnight lows will be in 60s to low 70s. * WHERE...Portions of North and North Central Idaho and Central, East Central, North Central, Northeast, and Southeast Washington. * WHEN...From noon Saturday to 10 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat.

* WHAT...Dangerously hot conditions during the day for the valleys. Highs will be in the 90s. Overnight lows will be in 50s to low 60s. * WHERE...Stehekin, Holden Village, and Stevens Pass. * WHEN...From noon Saturday to 10 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses.

* WHAT...Dangerously hot conditions during the day for the valleys. Highs will be in the 90s. Overnight lows will be in 50s to low 60s. * WHERE...Bonners Ferry, Fernwood, Kettle Falls, Lookout Pass, St. Maries, Fruitland, Chewelah, Priest River, Chesaw Road, Schweitzer Mountain Road, Metaline Falls, Colville, Sandpoint, Inchelium, Sherman Pass, Athol, Ione, Osburn, Mullan, Pinehurst, Eastport, Highway 20 Wauconda Summit, Republic, Flowery Trail Road, Dobson Pass, Tiger, Wallace, Boulder Creek Road, Metaline, Deer Park, Fourth Of July Pass, Newport, Springdale-Hunters Road, Clark Fork, Wauconda, Kellogg, Orin-Rice Road, and Northport. * WHEN...From noon Sunday to 10 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses.

...DRY AND BREEZY CONDITIONS FRIDAY AFTERNOON... .A weak weather system Friday will produce gusty winds and low relative humidity in the Cascade gaps and Waterville Plateau in the late afternoon and evening. The National Weather Service in Spokane has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 4 PM this afternoon to 10 PM PDT this evening. The Fire Weather Watch is no longer in effect. * Affected Area: Fire Weather Zone 705 Foothills of Central Washington Cascades (Zone 705) and Fire Weather Zone 706 Waterville Plateau (Zone 706). * Winds: Northwest 15 to 20 mph with gusts up to 30 mph. * Relative Humidities: 15 to 20 percent. * Impacts: Any new or existing fires will have the potential to spread rapidly.

...DRY AND LOCALLY BREEZY FRIDAY AND SATURDAY... .Breezy winds will develop Friday afternoon and evening through the Kittitas Valley and will be coincident with low relative humidities. Saturday, locally breezy winds and critically low relative humidities are anticipated across central Oregon. The National Weather Service in Pendleton has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 2 PM this afternoon to 9 PM PDT this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 690 Kittitas Valley. * WINDS...West 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Breezy conditions combined with low relative humidity will promote conditions conducive to rapid fire spread and extreme fire behavior.

...DRY AND LOCALLY BREEZY FRIDAY AND SATURDAY... .Breezy winds will develop Friday afternoon and evening through the Kittitas Valley and will be coincident with low relative humidities. Saturday, locally breezy winds and critically low relative humidities are anticipated across central Oregon. * AFFECTED AREA...Fire Weather Zones 610 East Slopes of Central Oregon Cascades, 611 Deschutes National Forest -minus Sisters Ranger District and 640 Central Mountains of Oregon. * WINDS...Northwest 10 to 15 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...As low as 6 percent. * IMPACTS...Locally breezy conditions combined with very low relative humidity will promote conditions conducive to rapid fire spread and extreme fire behavior.

* WHAT...Afternoon temperatures in the upper 80s to middle 90s expected. A few spots could reach close to 100 deg, mainly those lower valleys located towards the Willamette Valley. * WHERE...In Oregon, North Oregon Cascades, Cascades of Lane County, and Cascades of Marion and Linn Counties. In Washington, South Washington Cascades. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Hot temperatures may cause heat illnesses.

* WHAT...Dangerously hot conditions with temperatures 100 to 105 expected. Overnight temperatures will also be very warm, only falling below 70 degrees for a short period late each night, if at all. The warm nighttime temperatures will limit chances to recover from the heat, exacerbating the risk of heat-related illness in this prolonged heat wave. * WHERE...Portions of northwest and west central Oregon and southwest Washington. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

* WHAT...Dangerously hot conditions with temperatures 100 to 105 expected. Overnight temperatures will also be very warm, only falling below 70 degrees for a short period late each night, if at all. The warm nighttime temperatures will limit chances to recover from the heat, exacerbating the risk of heat-related illness in this prolonged heat wave. * WHERE...Portions of northwest and west central Oregon and southwest Washington. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

* WHAT...Afternoon temperatures in the upper 80s to middle 90s expected. A few spots could reach close to 100 deg, mainly those lower valleys located towards the Willamette Valley. * WHERE...In Oregon, North Oregon Cascades, Cascades of Lane County, and Cascades of Marion and Linn Counties. In Washington, South Washington Cascades. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Hot temperatures may cause heat illnesses.