Expected

* WHAT...On Saturday and Sunday, daytime highs between 105 and 110 degrees. On Monday, daytime highs between 100 and 106 degrees. * WHERE...Dawes County and Northern Sioux County. * WHEN...From 11 AM this morning to 9 PM MDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Temperatures will remain unusually warm Saturday night, with overnight lows expected in the mid to upper 70s. Take extra precautions when outside. Drink plenty of fluids and wear

* WHAT...Dangerously hot conditions with heat index values up to 112 expected. * WHERE...Antelope, Cedar, Knox, and Pierce Counties. * WHEN...From noon today to 7 AM CDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity 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...For the Heat Advisory, heat index values up to 109 expected. For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 113 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 110 possible. * WHERE...In Iowa, Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie, and Shelby Counties. In Nebraska, Douglas and Sarpy Counties. * WHEN...For the Heat Advisory, from noon today to noon CDT Sunday.

* WHAT...For the Heat Advisory, heat index values up to 109 expected. For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 113 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 110 possible. * WHERE...In Iowa, Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie, and Shelby Counties. In Nebraska, Douglas and Sarpy Counties. * WHEN...For the Heat Advisory, from noon today to noon CDT Sunday.

* WHAT...Dangerously hot conditions with heat index values up to 112 expected. * WHERE...Antelope, Cedar, Knox, and Pierce Counties. * WHEN...From noon today to 7 AM CDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity 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.

...Critical fire weather conditions continue through the weekend... .Hot, dry and windy conditions will peak this afternoon and Saturday east of the Cascades and potions of northern California. Humidities nudge higher on Sunday, although winds and low rhs may still meet red flag criteria. * AFFECTED AREA...In northern California, fire weather zone 284, covering eastern Siskiyou County and areas east of Mount Shasta. In Oregon, fire weather zone 625, covering the south

...Critical fire weather conditions continue through the weekend... .Hot, dry and windy conditions will peak this afternoon and Saturday east of the Cascades and potions of northern California. Humidities nudge higher on Sunday, although winds and low rhs may still meet red flag criteria. * IMPACTS...Any fires that develop will likely spread rapidly. * AFFECTED AREA...In Oregon, Fire weather zone 624 covering the Klamath Basin and Fremont-Winema National Forest. In

* WHAT...Dangerously hot conditions, with daytime temperatures 105 to 110 expected. * WHERE...Marble and Glen Canyons. * WHEN...Until 8 PM MST /9 PM MDT/ Sunday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. 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

* WHAT...Dangerously hot conditions expected below 4000 feet, with daytime temperatures around 105 degrees at Havasupai Gardens, and 112 to 114 degrees at Phantom Ranch. * WHERE...Lower elevations of the Grand Canyon. * WHEN...Until 8 PM MST Sunday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. This warning is reserved for only the hottest days of the year and is

* WHAT...Dangerously hot conditions, with temperatures up to 113 expected. * WHERE...Yavapai County Valleys and Basins. * WHEN...From 10 AM this morning to 9 PM MST this evening. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. 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