Severe

* WHAT...Dangerously hot conditions with temperatures up to 110. Warm overnight lows in the 70s will offer little relief. * WHERE...Capitol Reef National Park and Vicinity, Glen Canyon Recreation Area/Lake Powell, South Central Utah, Western Canyonlands, Lower Washington County, and Zion National Park. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Drink plenty of fluids, stay in an air-conditioned room, stay out of

* IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Wind Shift with a Cold Front could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...285. In North Central WY Fire Zones...275...276...282. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Big Horn...Hot Springs...Johnson...Park...Washakie. * WIND: West 15 to 25 mph with gusts up to 35 mph. * HUMIDITY: As low as 5 percent. * TEMPERATURES: Highs in the upper 90s to low 100s.

* IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Wind Shift with a Cold Front could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....289. In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 15 to 25 mph with gusts up to 35 mph.

* WHAT...Dangerously hot conditions. Afternoon temperatures 98 to 114. Major to Extreme Heat Risk. * WHERE...Southern Gila County and portions of northern Pinal County and eastern Maricopa County. * WHEN...Until 8 PM MST Monday. * IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. * ADDITIONAL DETAILS...In Maricopa County, Call 2-1-1 to find a free cooling center, transportation, water and more. https://www.maricopa.gov/heat

* WHAT...Dangerously hot conditions. Afternoon temperatures 112 to 120. Major to Extreme Heat Risk. * WHERE...In Arizona, Parker Valley and Yuma. In California, Imperial Valley, and Palo Verde Valley. * WHEN...Until 8 PM MST /8 PM PDT/ Monday. * IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to

* WHAT...Dangerously hot conditions. Afternoon temperatures 108 to 119. Major to Extreme Heat Risk. * WHERE...Mostly rural portions of southwest Arizona and southeast California, including Joshua Tree National Park. * WHEN...Until 8 PM MST /8 PM PDT/ Monday. * IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. An Extreme Heat Warning means that a period of very hot temperatures,

* WHAT...Dangerously hot conditions. Afternoon temperatures 109 to 118. Major to Extreme Heat Risk. * WHERE...Mostly rural areas of Maricopa County and northern Pinal County. * WHEN...Until 8 PM MST Monday. * IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. * ADDITIONAL DETAILS...In Maricopa County, Call 2-1-1 to find a free cooling center, transportation, water and more. https://www.maricopa.gov/heat

* WHAT...Dangerously hot conditions. Afternoon temperatures 110 to 117. Major to Extreme Heat Risk. * WHERE...The Phoenix metropolitan area. * WHEN...Until 8 PM MST Monday. * IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. * ADDITIONAL DETAILS...In Maricopa County, Call 2-1-1 to find a free cooling center, transportation, water and more. https://www.maricopa.gov/heat

* WHAT...Dangerously hot conditions with high temperatures of 100 to 108 expected. * WHERE...Portions of central, south central, and southeast Montana and north central Wyoming. * WHEN...From noon today to midnight MDT tonight. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Low temperatures are expected to be in the 70s for some locations east of Billings tonight bringing limited overnight relief. Sunday will be a little cooler but still hot with

...GUSTY WINDS AND LOW HUMIDITY EXPECTED THIS WEEKEND... .A building ridge to the south combined with a trough moving across western Canada will tighten the pressure gradient over the area through the weekend creating breezy to windy conditions for the weekend. This combined with warming temperatures and low humidity will lead to high fire danger across much of eastern Idaho. * AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM, Fire Weather Zone 422 Sawtooth