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* WHAT...Dangerously hot conditions with high temperatures of 90-98F and overnight low temperatures of 60-70F expected. * WHERE...Greater Portland/Vancouver Metro, Western and Central Columbia River Gorge, the Corbett area and the Hood River Valley, Central and Southern Willamette Valley, Foothills of the Northern and Central Oregon Cascades, Lower Columbia River and Cowlitz River Valleys, and South Washington Cascade Foothills. * WHEN...Until 11 PM 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...The warmest overnight lows are expected to occur in the Columbia River Gorge and in urban areas from Salem northward.

* WHAT...Hot conditions with high temperatures up to 93F and overnight low temperatures of 60-67F 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.

* WHAT...Morning low temperatures of 60 to 70 degrees, then very hot conditions with high temperatures of 98 to 104 degrees expected. * 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 this evening. * IMPACTS...Unusually hot temperatures will increase risk for heat related illnesses. Warm overnight temperatures will provide little relief from hot daytime temperatures.

The Oregon Department of Environmental Quality, and the Lane Regional Air Protection Agency have continued an Air Quality Advisory, which is in effect until 8 PM this evening. An Air Quality Advisory for Smoke 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 this evening. 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.orcaa.org www.swcleanair.gov www.oregon.gov/DEQ www.lrapa.org

The Oregon Department of Environmental Quality, and the Lane Regional Air Protection Agency have continued an Air Quality Advisory, which is in effect until 8 PM tonight. An Air Quality Advisory for ozone remains in effect. 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 this evening. 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.orcaa.org www.swcleanair.gov www.oregon.gov/DEQ www.lrapa.org

* IMPACTS...Abundant lightning on dry fuels resulting in the potential for numerous new fire starts. * AFFECTED AREA...In California, all of Fire weather zones 280, 281, 282, 284, and 285, and in Oregon, all of Fire weather zones 617, 620, 621, 622, 623, 624, and 625. * THUNDERSTORMS...Scattered thunderstorms with abundant lightning expected. Storms are likely to be wet, but lightning strikes outside of precipitation cores are possible, and may cause many new fire starts. * OUTFLOW WINDS...Gusts of 35 to 50 mph could travel outward up to 25 miles from thunderstorm cores. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

ESFBOI Monsoon moisture will bring a threat of showers and thunderstorms to the region through midweek. High atmospheric moisture will allow for isolated thunderstorms producing heavy rain accumulations, leading to an increased threat of flash flooding. Tuesday and Wednesday currently have the highest chance for locally heavy rains, especially in southeast Oregon, near the ID- NV border, and high terrain in southwest Idaho. Conditions dry out after Thursday. Burn scars are the highest risk for flash flooding. The Wapiti Fire burn scar near Grandjean, ID, the Durkee Fire burn scar near Ironside, OR, and the Lava Fire burn scar near Cascade, ID are of particular concern for flash flooding.

* WHAT...Hot conditions with high temperatures ranging from the 80s to near 90 degrees expected and low temperatures 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 Wednesday. * 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 low 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 Wednesday. * 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 Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

* WHAT...Hot conditions with high temperatures in the mid to upper 80s and low temperatures in the 60s to 70s. This will pose a moderate risk of heat-related illness. * WHERE...Eastern Strait of Juan de Fuca and Western Strait of Juan de Fuca. * 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 low 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 Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

* 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 to 30 percent. * TEMPERATURES...Up to 90 to near 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...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...Until 9 PM PDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Lingering cloud cover from thunderstorms in 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...Until 9 PM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Lingering cloud cover from thunderstorms in 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...Until 9 PM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Lingering cloud cover from thunderstorms in 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...Until 9 PM PDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Lingering cloud cover from thunderstorms in southern Oregon may result in lower than forecast afternoon temperatures or higher than forecast overnight low temperatures.

* WHAT...Very hot conditions with high temperatures of 98 to 104 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...Very hot conditions with high temperatures of 100 to 105 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 100 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 this evening. * IMPACTS...Hot temperatures may cause heat related illnesses.