Expected

* WHAT...High temperatures 100 to 105 degrees in the valleys each afternoon. Low temperatures 62 to 70 degrees in the valleys each night. This will result in a major risk for heat-related illnesses for much of the population, especially those without effective cooling. * WHERE...Northern Lander and Northern Eureka, Southern Lander and Southern Eureka, Southwest Elko, Northeastern Nye, and Northwestern Nye Counties. * WHEN...Until 11 PM PDT Sunday.

* WHAT...High temperatures 100 to 105 degrees in the valleys each afternoon. Low temperatures 73 to 78 degrees in the valleys each night. This will result in a major risk for heat-related illnesses for much of the population, especially those without effective cooling. * WHERE...Southeastern Elko County. * WHEN...Until 11 PM PDT Monday. * IMPACTS...Heat-related illnesses increase significantly during extreme heat events. Take extra precautions when outside. Wear lightweight and loose

* WHAT...High temperatures 100 to 103 degrees in the valleys each afternoon. Low temperatures 60 to 65 degrees in the valleys each night. This will result in a major risk for heat-related illnesses for much of the population, especially those without effective cooling. * WHERE...Humboldt County. * WHEN...Until 11 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat. Drink plenty of fluids, stay in an air-conditioned room, stay out of

* WHAT...High temperatures 100 to 105 degrees in the valleys each afternoon. Low temperatures 73 to 78 degrees in the valleys each night. This will result in a major risk for heat-related illnesses for much of the population, especially those without effective cooling. * WHERE...South Central Elko County. * WHEN...Until 11 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat. Take extra precautions when outside. Wear lightweight and loose

* WHAT...Dangerously hot conditions with temperatures 98 to 102 with little overnight relief through Sunday. * WHERE...Castle Country, San Rafael Swell, Western Millard and Juab Counties, Great Salt Lake Desert and Mountains, Northern Wasatch Front, Salt Lake Valley, and Tooele and Rush Valleys. * WHEN...Until midnight MDT Sunday Night. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Drink plenty of fluids, stay in an air-conditioned room, stay out of

* WHAT...Dangerously hot conditions with temperatures up to 110. * WHERE...Glen Canyon Recreation Area/Lake Powell, Lower Washington County, and Zion National Park. * WHEN...Until 9 PM MDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

* WHAT...Dangerously hot conditions with temperatures up to 105. * WHERE...Capitol Reef National Park and Vicinity, South Central Utah, and Western Canyonlands. * WHEN...Until 9 PM MDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

...GUSTY WINDS AND VERY LOW HUMIDITY THIS WEEKEND... * AFFECTED AREA...Fire Weather Zone 475 East Salmon River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF. * WINDS...West 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Wind and low humidity can lead to rapid spread of fire. A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho:

* AFFECTED AREA...Lincoln Ranger District of the Helena National Forest, Central and Eastern Lewis and Clark National Forest Areas and Helena and Townsend Ranger Districts of the Helena National Forest. * WINDS...Northwest 5 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 12 percent. * TEMPERATURES...Up to 92. * IMPACTS...Any fires that develop will spread rapidly. Containment of any ongoing or new fires may be very difficult. Outdoor burning is not recommended.

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR NORTHERN FOOT HILLS, BUTTE COUNTY AREA, NORTHERN CAMPBELL, SOUTHERN CAMPBELL, CROOK COUNTY PLAINS, WESTON COUNTY PLAINS, AND WYOMING BLACK HILLS... * AFFECTED AREA...Fire Weather Zones 314, 315, 316, 317, 318, 323, and 327. * TIMING...Until 8 PM MDT this evening. * WINDS...Northwest winds 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...Relative Humidity between 8 to 15 percent.