Expected

* CHANGES...None. * Affected Area...Fire Weather Zone 270 Surprise Valley California, Fire Weather Zone 278 Eastern Lassen County, including the Biscar Fire, and Fire Weather Zone 458 Northern Washoe County. * Winds...Southwest 15 to 25 mph with gusts up to 35 mph. * Humidity...Minimum humidity 6 to 11 percent. Limited overnight humidity recovery of 25 to 45 percent. * Duration...3 to 6 hours. * Impacts...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity before first

* WHAT...Dangerously hot conditions with heat index values up to 108. * WHERE...Portions of south central and southwestern South Dakota. * WHEN...Until 8 PM MDT /9 PM CDT/ Sunday. * 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.

* WHAT...Dangerously hot conditions with heat index values up to 106. * WHERE...Ziebach. * WHEN...Until 8 PM MDT Sunday. * 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.

* WHAT...Dangerously hot conditions with heat index values up to 115 expected. * WHERE...Craig, Mayes, Nowata, Rogers, Tulsa, Wagoner, and Washington OK Counties. * WHEN...From noon to 8 PM CDT Sunday. * 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

* WHAT...Dangerously hot conditions with heat index values up to 115 expected. * WHERE...In Arkansas, Southern Crawford, Central and Southern Franklin, and North and Central Sebastian Counties. In Oklahoma, Central and Southern Sequoyah, Muskogee, Okmulgee, Haskell, McIntosh, and Northern Le Flore Counties. * WHEN...From noon to 8 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT...Dangerously hot conditions with heat index values up to 115 expected. * WHERE...Portions of East Arkansas, North Mississippi, Southeast Missouri, and West Tennessee. * WHEN...From 11 AM Sunday to 8 PM CDT Tuesday. * 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.

* AFFECTED AREA...In Oregon, the southeastern portions of Fire Weather Zone 624 covering the Fremont National Forest south of Summer Lake. In California, Fire Weather Zone 285 covering Modoc County except for Surprise Valley. * WINDS...Southwest to west 10 to 20 mph with gusts up to 35 mph. * MINIMUM HUMIDITY...9 to 15 percent. * DURATION...3 to 6 hours. * DETAILED URL...View the hazard area in detail at https://weather.gov/wrh/hazards?wfo=mfr Follow all fire restrictions. You can find your county's

* 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 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 with heat index values up to 116 expected. * WHERE...Northern Scott County, Southern Johnson County, Southern and Eastern Logan County, and Western and Northern Logan County Counties. * WHEN...From 11 AM Sunday to 8 PM CDT Tuesday. * 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.