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The Lane Regional Air Protection Agency has issued an Air Quality Advisory, which is IN EFFECT UNTIL 9 PM PDT THURSDAY. An Air Quality Advisory for Smoke has been issued. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels at times through 9 PM PDT Thursday. 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.lrapa.org

* Affected Area: East Washington Central Cascades (Zone 696). * Winds: Terrain driven 2 to 5 mph becoming northwest 5 to 10 mph in the evening. * Relative Humidities: Minimum 13 to 19 percent. Humidity recoveries on midslopes within thermal belts of 25 to 35 percent. * Temperatures: 85 to 100 degrees. * Impacts: Hot, dry, unstable conditions will lead to the potential for rapid fire growth on new or existing fires.

...RED FLAG WARNING ISSUED FOR ABUNDANT LIGHTNING FOR TODAY AND TOMORROW OVER SOUTHERN DESCHUTES NATIONAL FOREST... The National Weather Service in Pendleton has issued a Red Flag Warning for abundant lightning, which is in effect until 8 PM PDT Wednesday. * AFFECTED AREA...Fire Weather Zone 705 Southern Deschutes National Forest. * TIMING...Until 8 PM PDT Wednesday. * IMPACTS...Thunderstorm outflow winds may result in unanticipated erratic fire spread. Outdoor burning is not recommended. * THUNDERSTORMS...Isolated to scattered storms (confidence 25-35%). * OUTFLOW WINDS...Gust as high as 40 mph.

The National Weather Service in Portland has issued a Red Flag Warning for thunderstorms, which is in effect from noon to 9 PM PDT Wednesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...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. * DRY AND UNSTABLE...Unstable conditions with elevated mixing heights may promote pyroconvective activity over ongoing fires. Relative humidities as low as 20%. Temperatures up to 90 to 95. * IMPACTS...Conditions may be favorable for rapid fire spread which may threaten life and property. High instability may result in fire growth.

The National Weather Service in Portland has issued a Red Flag Warning for thunderstorms, which is in effect from noon to 9 PM PDT Wednesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Oregon, Fire Weather Zone 688 Mt. Hood National Forest Region. * THUNDERSTORMS...A 15 to 20% chance of dry thunderstorms. Storms may produce very little rainfall, increasing the risk of new fire starts from dry lightning. * OUTFLOW WINDS...Instantaneous gusts as high as 40 mph. Gusts at these speeds can be observed tens of miles away from the core of the thunderstorm. * DRY AND UNSTABLE...Unstable conditions with elevated mixing heights may promote pyroconvective activity over ongoing fires. * IMPACTS...Conditions may be favorable for rapid fire spread which may threaten life and property. Thunderstorm outflow winds may result in unanticipated erratic fire spread. High instability may result in fire growth. Frequent lightning and critically dry fuels may result in new fire starts.

* AFFECTED AREA...In Oregon, Fire Weather Zone 689 Northern Willamette National Forest and Fire Weather Zone 690 Southern Willamette National Forest. * THUNDERSTORMS...A 20 to 30% chance of dry thunderstorms. Storms may produce very little rainfall, increasing the risk of new fire starts from dry lightning. * OUTFLOW WINDS...Instantaneous gusts as high as 40 mph. Gusts at these speeds can be observed tens of miles away from the core of the thunderstorm. * DRY AND UNSTABLE...Unstable conditions with elevated mixing heights may promote pyroconvective activity over ongoing fires. * IMPACTS...Conditions will be favorable for rapid fire spread which may threaten life and property. Thunderstorm outflow winds may result in unanticipated erratic fire spread. High instability may result in fire growth. Frequent lightning and critically dry fuels may result in new fire starts.

The National Weather Service in Seattle has upgraded the Fire Weather Watch to a Red Flag Warning for hot, dry and unstable conditions, which is in effect from noon to 9 PM PDT Wednesday. * 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 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.

* WHAT...Hot conditions with temperatures up to 97 degrees expected. This will pose a moderate to major risk of heat-related illness. * WHERE...In Oregon, Central Oregon, John Day Basin, Grande Ronde Valley, and Northern Blue Mountains of Oregon. In Washington, Lower Slopes of the Eastern Washington Cascades Crest and Northwest Blue Mountains. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses.

* WHAT...Dangerously hot conditions with temperatures up to 100 degrees expected. This will pose a major risk of heat-related illness. * WHERE...Portions of north central and northeast Oregon and central, south central, and southeast Washington. * WHEN...Until 8 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Daily high temperature records are at risk for many cities in the warning area Tuesday through Thursday.

* WHAT...Dangerously hot conditions with temperatures up to 100 degrees expected. This will pose a major risk of heat-related illness. * WHERE...Portions of north central and northeast Oregon and central, south central, and southeast Washington. * WHEN...Until 8 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Daily high temperature records are at risk for many cities in the warning area Tuesday through Thursday.

* WHAT...Hot conditions with temperatures up to 97 degrees expected. This will pose a moderate to major risk of heat-related illness. * WHERE...In Oregon, Central Oregon, John Day Basin, Grande Ronde Valley, and Northern Blue Mountains of Oregon. In Washington, Lower Slopes of the Eastern Washington Cascades Crest and Northwest Blue Mountains. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses.

* WHAT...Afternoon high temperatures in the mid to upper 90s and overnight low temperatures in the mid 60s to lower 70s expected. * WHERE...Western and Central Columbia River Gorge and the Hood River Valley. * WHEN...Until 9 PM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Increasing high clouds may limit high temperatures on Wednesday compared to Tuesday, however probabilities for high temperatures above 90 degrees on Wednesday are high, ranging from 75-95%.

* WHAT...Afternoon high temperatures in the mid to upper 90s and overnight low temperatures in the mid 60s to lower 70s expected. * WHERE...Western and Central Columbia River Gorge and the Hood River Valley. * WHEN...Until 9 PM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Increasing high clouds may limit high temperatures on Wednesday compared to Tuesday, however probabilities for high temperatures above 90 degrees on Wednesday are high, ranging from 75-95%.

The Washington State Department of Ecology and/or the Yakima Regional Clean Air Agency has issued an Air Quality Alert until further notice. An Air Quality Alert has been issued for Kittitas and Yakima Counties until further notice due to current and expected wildfire smoke from the Wildcat Fire. Particulate matter may reach Unhealthy levels. When air quality is Unhealthy, everyone should reduce exposure. Limit time outside, avoid strenuous outdoor activity, and follow tips for cleaner indoor air. Hot temperatures will increase the risk of heat-related illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Information about air quality from the Washington Department of Ecology Web site is available at http://www.ecy.wa.gov/air.html or call 360-407-6000.Information about air quality is on the Yakima Regional Clean Air Agency Web site at http://www.yakimacleanair.org or call 509-834-2050.

* AFFECTED AREA...In California, Fire weather zone 285. In Oregon, Fire weather zones 617, 623, 624 and 625. * THUNDERSTORMS...Scattered thunderstorms with abundant lightning possible. Storms may produce little or no rain, and lightning strikes outside of precipitation cores are possible, and may cause many new fire starts. Thunderstorms are expected to continue overnight and through Wednesday afternoon along and east of the Cascades. * OUTFLOW WINDS...Gusts of 35 to 50 mph could travel outward up to 25 miles from thunderstorm cores. * ADDITIONAL DETAILS...In addition to thunderstorm potential, conditions on Tuesday will be hot, dry, breezy, and unstable, adding to the heightened fire weather concerns for the day. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* AFFECTED AREA...In California, Fire weather zones 280 and 281. In Oregon, Fire weather zone 621. * THUNDERSTORMS...Scattered thunderstorms with abundant lightning possible. Storms may produce little or no rain, and 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. * ADDITIONAL DETAILS...IN addition to thunderstorm potential, conditions on Tuesday will be hot, dry, breezy, and unstable, adding to the heightened fire weather concerns for the day. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

An Air Quality Alert has been issued by the following agencies: Washington Department of Ecology Spokane Regional Clean Air Agency An Air Quality Alert has been issued for Stevens, Spokane, Lincoln, and Grant Counties until further notice due to current wildfire smoke from regional wildfires. Particulate matter (PM2.5) levels are Unhealthy and smoke is expected to continue. When air quality is Unhealthy, residents should take steps to reduce exposure. Limit time outside, avoid strenuous outdoor activity, and follow tips for cleaner indoor air. Hot temperatures will increase the risk of heat- related illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with high temperatures of 96 to 106 degrees. * WHERE...Lapwai, Alpowa Summit, Peck, Gifford, Lewiston Grade, Culdesac, Lewiston, Clarkston, and Pomeroy. * WHEN...Until 8 PM PDT Thursday. * IMPACTS...Hot temperatures will increase the risk of heat-related illnesses. Heat Risk of this magnitude impacts almost everyone who does not have access to adequate cooling or hydration.

* WHAT...Hot temperatures. High temperatures 95 to 103 degrees. Limited overnight relief with low temperatures 60 to 70 degrees. * WHERE...Post Falls, Downtown Spokane, Worley, Airway Heights, Mansfield, Coeur d'Alene, Hayden, Creston, Ritzville, Cheney, Waterville, Fairfield, Badger Mountain Road, Harrington, Odessa, Rockford, Spokane Valley, Davenport, Wilbur, Grand Coulee, and Coulee City. * WHEN...Until 8 PM PDT Thursday. * IMPACTS...Hot temperatures will increase the risk of heat-related illnesses. Heat Risk of this magnitude impacts almost everyone who does not have access to adequate cooling or hydration.

* WHAT...Dangerously hot conditions with high temperatures of 95 to 105 degrees. * WHERE...Othello, Cashmere, Nespelem, Number 2 Canyon, Disautel Pass, Entiat, Okanogan, Chelan, Tonasket, Omak, Moses Lake, Number 1 Canyon, Quincy, Wenatchee, Bridgeport, Brewster, Oroville, Pangborn Airport, and Ephrata. * WHEN...Until 8 PM PDT Thursday. * IMPACTS...Hot temperatures will increase the risk of heat-related illnesses. Heat Risk of this magnitude impacts almost everyone who does not have access to adequate cooling or hydration.