Expected

* WHAT...Dangerously hot conditions with highs of 110 to 115 in the Las Vegas Valley, Pahrump, Moapa Valley, and the Colorado River Valley, and up to 120 in Death Valley. Warm overnight temperatures will result in little relief overnight. * WHERE...Lake Mohave, Lake Mead, Lower Colorado River Valley / Lake Havasu, Death Valley National Park, Northeast Clark County, Western Clark and Southern Nye County, and Las Vegas Valley. * WHEN...Until 8 PM PDT /8 PM MST/ Monday.

* WHAT...Dangerously hot conditions expected below 4500 feet, with daytime temperatures ranging from 95 to 105 degrees at Havasupai Gardens, 110 to 115 degrees at Phantom Ranch, and 102 to 106 at Page. * WHERE...Lower elevations of the Grand Canyon, and Marble and Glen Canyons; including Page and Phantom Ranch. * WHEN...From 9 AM MST /10 AM MDT/ this morning to 8 PM MST /9 PM MDT/ this evening. * IMPACTS...Most individuals will be at risk for heat-related

* WHAT...Dangerously hot conditions. Afternoon temperatures 109 to 112. Major Heat Risk. * WHERE...Buckeye/Avondale, Central Phoenix, Deer Valley, East Valley, North Phoenix/Glendale, Northwest Valley, Scottsdale/Paradise Valley, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek. * WHEN...Until 8 PM MST this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat

* WHAT...Dangerously hot conditions. Afternoon temperatures 107 to 113. Major Heat Risk. * WHERE...In Arizona, Central La Paz, Gila River Valley, Kofa, Parker Valley, Southeast Yuma County, and Yuma. In California, Chuckwalla Valley and Palo Verde Valley. * WHEN...Until 8 PM MST /8 PM PDT/ this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke.

* WHAT...Dangerously hot conditions. Afternoon temperatures 106 to 115. Major Heat Risk. * WHERE...Imperial County Southeast, Imperial County Southwest, Imperial County West, Imperial Valley, and Salton Sea. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke.

* WHAT...Dangerously hot conditions. Afternoon temperatures 99 to 111. Major Heat Risk. * WHERE...Chuckwalla Mountains, Chiriaco Summit, Joshua Tree NP East, and Joshua Tree NP West. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. An Extreme Heat Warning means that a period of very hot temperatures,

* WHAT...Dangerously hot conditions. Afternoon temperatures 106 to 113. Major Heat Risk. * WHERE...Aguila Valley, Apache Junction/Gold Canyon, Cave Creek/New River, Fountain Hills/East Mesa, Gila Bend, Northwest Pinal County, Sonoran Desert Natl Monument, Tonopah Desert, and West Pinal County. * WHEN...Until 8 PM MST this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat

* WHAT...High temperatures of 101 to 106 degrees with overnight lows of 67 to 74 degrees. Widespread Major HeatRisk with isolated Extreme HeatRisk in lower valleys. * WHERE...Western Nevada Basin and Range including Pyramid Lake. * WHEN...Until 8 AM PDT Monday. * IMPACTS...Heat related illnesses increase significantly, particularly for those working or participating in outdoor activities. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* AFFECTED AREA: In Central WY Fire Zones...280...283...285...288...289...300. In North Central WY Fire Zones...275...276...281...282...287. In Northwest WY Fire Zones...140...286. In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Big Horn...Hot Springs...Johnson...Park Washakie. In Northwest WY...Yellowstone National Park.

The National Weather Service in Norman has issued a Red Flag Warning for western Oklahoma, which is in effect from 1 PM this afternoon to 9 PM CDT this evening. * WINDS...South 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 14 percent. * TEMPERATURES...Up to 106. * IMPACTS... * SEVERITY... FUELS (ERC)...90th+ percentile...5 (out of 5). WEATHER...Elevated...2 (out of 5). FIRE ENVIRONMENT...7 (out of 10). A Red Flag Warning means that critical fire weather conditions