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...HOT, DRY, UNSTABLE CONDITIONS ALONG THE EAST SLOPES OF THE CASCADES TODAY... ...RED FLAG WARNING FOR WIND AND LOW HUMIDITY WEDNESDAY AFTERNOON AND EVENING IN CENTRAL WASHINGTON... * Affected Area: Fire Weather Zone 698 East Washington North Cascades (Zone 698). * Relative Humidities: 8 to 23 percent. * Temperatures: High temperatures 97 to 104 in the valleys, 80s and 90s in the mountains. * Impacts:Hot, dry, and unstable conditions will lead to the potential for rapid fire growth on any new or existing fires.

...HOT, DRY AND UNSTABLE ALONG WITH BREEZY WINDS TUESDAY THROUGH THURSDAY... High pressure that has brought the hot temperatures the past weekend is showing signs of breaking down. The instability will increase as a result, and the combination of hot, dry and unstable weather warrants Red Flag Warnings. In addition, breezy winds will develop through the Cascade gaps and into portions of the Columbia Basin Wednesday and Thursday, and will coincide with low relative humidities in the afternoon and evening. 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 Wednesday to 8 PM PDT Thursday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 690 Kittitas Valley. * WINDS...Northwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS...Breezy conditions combined with low RHs will result in rapid fire spread and extreme fire behavior.

...HOT, DRY AND UNSTABLE ALONG WITH BREEZY WINDS TUESDAY THROUGH THURSDAY... High pressure that has brought the hot temperatures the past weekend is showing signs of breaking down. The instability will increase as a result, and the combination of hot, dry and unstable weather warrants Red Flag Warnings. In addition, breezy winds will develop through the Cascade gaps and into portions of the Columbia Basin Wednesday and Thursday, and will coincide with low relative humidities in the afternoon and evening. 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 to 11 PM PDT Wednesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 641 Lower Columbia Basin of Oregon and 691 Lower Columbia Basin. * WINDS...West 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Breezy conditions combined with low RHs will result in rapid fire spread and extreme fire behavior.

...HOT, DRY AND UNSTABLE ALONG WITH BREEZY WINDS TUESDAY THROUGH THURSDAY... High pressure that has brought the hot temperatures the past weekend is showing signs of breaking down. The instability will increase as a result, and the combination of hot, dry and unstable weather warrants Red Flag Warnings. In addition, breezy winds will develop through the Cascade gaps and into portions of the Columbia Basin Wednesday and Thursday, and will coincide with low relative humidities in the afternoon and evening. * AFFECTED AREA...Fire Weather Zones 642 Southern Blue and Strawberry Mountains, 643 Northern Blue Mountains of Oregon, 644 Central Blue Mountains, 645 Wallowa District, 692 Blue Mountains of Washington and 693 Southeast Washington Grande Ronde Valley. * TIMING...Tuesday afternoon through Wednesday evening. * WINDS...Northwest 10 to 15 mph. * RELATIVE HUMIDITY...As low as 9 percent. * TEMPERATURES...Up to 100. * IMPACTS...Any new and existing fires have a strong potential for extreme fire behavior. * HAINES...As high as 6.

...HOT, DRY AND UNSTABLE ALONG WITH BREEZY WINDS TUESDAY THROUGH THURSDAY... High pressure that has brought the hot temperatures the past weekend is showing signs of breaking down. The instability will increase as a result, and the combination of hot, dry and unstable weather warrants Red Flag Warnings. In addition, breezy winds will develop through the Cascade gaps and into portions of the Columbia Basin Wednesday and Thursday, and will coincide with low relative humidities in the afternoon and evening. * AFFECTED AREA...Fire Weather Zones 610 East Slopes of Central Oregon Cascades, 611 Deschutes National Forest -minus Sisters Ranger District, 694 Yakama Alpine District and 695 East Washington South Central Cascade Mountains. * TIMING...Through Tuesday night. * WINDS...Northwest 5 to 10 mph. * RELATIVE HUMIDITY...As low as 11 percent. * TEMPERATURES...Up to 101. * IMPACTS...Any new and existing fires have a strong potential for extreme fire behavior. * HAINES...As high as 6.

...HOT, DRY AND UNSTABLE ALONG WITH BREEZY WINDS TUESDAY THROUGH THURSDAY... High pressure that has brought the hot temperatures the past weekend is showing signs of breaking down. The instability will increase as a result, and the combination of hot, dry and unstable weather warrants Red Flag Warnings. In addition, breezy winds will develop through the Cascade gaps and into portions of the Columbia Basin Wednesday and Thursday, and will coincide with low relative humidities in the afternoon and evening. 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 to 11 PM PDT Wednesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 641 Lower Columbia Basin of Oregon and 691 Lower Columbia Basin. * WINDS...West 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Breezy conditions combined with low RHs will result in rapid fire spread and extreme fire behavior.

...HOT, DRY AND UNSTABLE ALONG WITH BREEZY WINDS TUESDAY THROUGH THURSDAY... High pressure that has brought the hot temperatures the past weekend is showing signs of breaking down. The instability will increase as a result, and the combination of hot, dry and unstable weather warrants Red Flag Warnings. In addition, breezy winds will develop through the Cascade gaps and into portions of the Columbia Basin Wednesday and Thursday, and will coincide with low relative humidities in the afternoon and evening. * AFFECTED AREA...Fire Weather Zones 642 Southern Blue and Strawberry Mountains, 643 Northern Blue Mountains of Oregon, 644 Central Blue Mountains, 645 Wallowa District, 692 Blue Mountains of Washington and 693 Southeast Washington Grande Ronde Valley. * TIMING...Tuesday afternoon through Wednesday evening. * WINDS...Northwest 10 to 15 mph. * RELATIVE HUMIDITY...As low as 9 percent. * TEMPERATURES...Up to 100. * IMPACTS...Any new and existing fires have a strong potential for extreme fire behavior. * HAINES...As high as 6.

...HOT, DRY AND UNSTABLE ALONG WITH BREEZY WINDS TUESDAY THROUGH THURSDAY... High pressure that has brought the hot temperatures the past weekend is showing signs of breaking down. The instability will increase as a result, and the combination of hot, dry and unstable weather warrants Red Flag Warnings. In addition, breezy winds will develop through the Cascade gaps and into portions of the Columbia Basin Wednesday and Thursday, and will coincide with low relative humidities in the afternoon and evening. The National Weather Service in Pendleton has issued a Red Flag Warning for dry and unstable conditions followed by breezy winds and low relative humidity, which is in effect Tuesday and Wednesday. * AFFECTED AREA...Fire Weather Zones 639 East Slopes of the Northern Oregon Cascades and 640 Central Mountains of Oregon. * TIMING...Today through Wednesday night. * WINDS...Northwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 7 percent. * TEMPERATURES...Up to 104. * IMPACTS...Any new and existing fires have a strong potential for extreme fire behavior. * HAINES...As high as 6.

...HOT, DRY AND UNSTABLE ALONG WITH BREEZY WINDS TUESDAY THROUGH THURSDAY... High pressure that has brought the hot temperatures the past weekend is showing signs of breaking down. The instability will increase as a result, and the combination of hot, dry and unstable weather warrants Red Flag Warnings. In addition, breezy winds will develop through the Cascade gaps and into portions of the Columbia Basin Wednesday and Thursday, and will coincide with low relative humidities in the afternoon and evening. * AFFECTED AREA...Fire Weather Zones 610 East Slopes of Central Oregon Cascades, 611 Deschutes National Forest -minus Sisters Ranger District, 694 Yakama Alpine District and 695 East Washington South Central Cascade Mountains. * TIMING...Through Tuesday night. * WINDS...Northwest 5 to 10 mph. * RELATIVE HUMIDITY...As low as 11 percent. * TEMPERATURES...Up to 101. * IMPACTS...Any new and existing fires have a strong potential for extreme fire behavior. * HAINES...As high as 6.

...HOT, DRY AND UNSTABLE ALONG WITH BREEZY WINDS TUESDAY THROUGH THURSDAY... High pressure that has brought the hot temperatures the past weekend is showing signs of breaking down. The instability will increase as a result, and the combination of hot, dry and unstable weather warrants Red Flag Warnings. In addition, breezy winds will develop through the Cascade gaps and into portions of the Columbia Basin Wednesday and Thursday, and will coincide with low relative humidities in the afternoon and evening. The National Weather Service in Pendleton has issued a Red Flag Warning for dry and unstable conditions followed by breezy winds and low relative humidity, which is in effect Tuesday and Wednesday. * AFFECTED AREA...Fire Weather Zones 639 East Slopes of the Northern Oregon Cascades and 640 Central Mountains of Oregon. * TIMING...Today through Wednesday night. * WINDS...Northwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 7 percent. * TEMPERATURES...Up to 104. * IMPACTS...Any new and existing fires have a strong potential for extreme fire behavior. * HAINES...As high as 6.

* WHAT...For the Excessive Heat Warning, dangerously hot conditions through Friday expected, especially in the lower elevations. For the Excessive Heat Watch, dangerously hot conditions possible. * WHERE...Portions of southwest and west central Idaho and southeast Oregon. * WHEN...For the Excessive Heat Warning, until midnight MDT /11 PM PDT/ Friday night. For the Excessive Heat Watch, from late Friday night through Sunday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Temperatures of 103 to 110 expected for lower elevations through Friday.

* WHAT...For the Heat Advisory, hot temperatures expected in the lower elevations. For the Excessive Heat Watch, dangerously hot conditions possible. * WHERE...Southwest Highlands, Western Magic Valley and Southern Twin Falls County. * WHEN...For the Heat Advisory, until midnight MDT Friday night. For the Excessive Heat Watch, from late Friday night through Sunday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Temperatures of 100 to 104 for lower elevations expected.

* WHAT...For the Excessive Heat Warning, dangerously hot conditions through Friday expected, especially in the lower elevations. For the Excessive Heat Watch, dangerously hot conditions possible. * WHERE...Baker County. * WHEN...For the Excessive Heat Warning, until 11 PM PDT Friday. For the Excessive Heat Watch, from Friday evening through Sunday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Temperatures of 103 to 110 expected for lower elevations through Friday, except slightly cooler temperatures expected Thursday.

* WHAT...For the Heat Advisory, hot temperatures expected in the lower elevations. For the Excessive Heat Watch, dangerously hot conditions possible. * WHERE...Southwest Highlands, Western Magic Valley and Southern Twin Falls County. * WHEN...For the Heat Advisory, until midnight MDT Friday night. For the Excessive Heat Watch, from late Friday night through Sunday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Temperatures of 100 to 104 for lower elevations expected.

* WHAT...For the Excessive Heat Warning, dangerously hot conditions through Friday expected, especially in the lower elevations. For the Excessive Heat Watch, dangerously hot conditions possible. * WHERE...Portions of southwest and west central Idaho and southeast Oregon. * WHEN...For the Excessive Heat Warning, until midnight MDT /11 PM PDT/ Friday night. For the Excessive Heat Watch, from late Friday night through Sunday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Temperatures of 103 to 110 expected for lower elevations through Friday.

* WHAT...For the Excessive Heat Warning, dangerously hot conditions through Friday expected, especially in the lower elevations. For the Excessive Heat Watch, dangerously hot conditions possible. * WHERE...Baker County. * WHEN...For the Excessive Heat Warning, until 11 PM PDT Friday. For the Excessive Heat Watch, from Friday evening through Sunday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Temperatures of 103 to 110 expected for lower elevations through Friday, except slightly cooler temperatures expected Thursday.

Oregon Department of Environmental Quality has issued an Air Pollution Advisory...in effect until 2 PM PDT Thursday. A wildfire burning in the region combined with forecast conditions will cause air quality levels to fluctuate and could be at unhealthy levels. The Oregon Department of Environmental Quality issued an air quality advisory for Jackson County due to smoke from the Salt Creek fire. DEQ also expects other areas of the state may see intermittent smoke from ongoing large wildfires. Smoke levels can change rapidly depending on the weather. 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. Keep windows and doors closed. If its too hot, run air conditioning on recirculate or consider moving to a cooler location. Avoid strenuous outdoor activity. Use high- efficiency particulate air (HEPA) filters in indoor ventilation systems or portable air purifiers. Be aware of smoke in your area and avoid places with the highest levels. When air quality improves to moderate or healthy, open windows and doors to air out homes and businesses. If you have a breathing plan for a medical condition, be sure to follow it and keep any needed medications refilled. For additional information...please visit the web site at https://oregonsmoke.org

* WHAT...Dangerously hot conditions with high temperatures 105 to 110 degrees, and low temperatures in the mid 60s to lower 70s through Tuesday, then continuing hot with high temperatures 100 to 110 on Wednesday. * WHERE...In California, western and central Siskiyou County. This includes the cities of Yreka, Weed, Etna, 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 Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Area rivers will be cold and can cause shock to swimmers.

* WHAT...High temperatures of 95 to 102 degrees with lows in the mid to upper 50s expected. * 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 Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. Area rivers will be cold and can cause shock to swimmers.

* WHAT...High temperatures of 100 to 108 with low temperatures in the mid to upper 60s expected. * WHERE...Central Douglas County and Eastern Douglas County Foothills. This includes the cities of Roseburg, Toketee Falls, and Sutherlin. * WHEN...Until 9 PM PDT this evening. * 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. * ADDITIONAL DETAILS...This will be a long-duration heatwave with hot temperatures through Tuesday.