Expected

* WHAT...Dangerously hot conditions, with temperatures around 107 to 114 expected below 4000 feet. * WHERE...Northern Gila and Yavapai counties below 4000 feet; including the Verde Valley and Black Canyon City. * 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. 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 expected below 4000 feet, with daytime temperatures ranging from 104 to 109 degrees at Havasupai Gardens, and 112 to 117 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 101 to 106 in Santa Cruz and Cochise Counties and 107 to 113 elsewhere. Major to Extreme HeatRisk is expected. * WHERE...Eastern Cochise County below 5000 feet, South Central Pinal County, Southeast Pinal County, Tohono O'odham Nation, Tucson Metro Area, Upper Gila River Valley, Upper San Pedro River Valley, Upper Santa Cruz River Valley/Altar Valley, and Western Pima County. * WHEN...Until 8 PM MST Monday.

...DRY COLD FRONTAL PASSAGE SATURDAY... Critical fire weather conditions as a dry cold front moves through the region. Winds begin to rise Saturday afternoon, although mostly remain 15 to 20 mph with 25 to 30 mph gusts. At the same time, minimum RHs across the area are well below 20%, down to 10% in the high desert. Winds increase overnight as RHs begin to rise out. Winds 20 to 25 mph with gusts up to 45 mph are possible from Baker County through the Lower Treasure Valley

...DRY COLD FRONTAL PASSAGE SATURDAY... Critical fire weather conditions as a dry cold front moves through the region. Winds begin to rise Saturday afternoon, although mostly remain 15 to 20 mph with 25 to 30 mph gusts. At the same time, minimum RHs across the area are well below 20%, down to 10% in the high desert. Winds increase overnight as RHs begin to rise out. Winds 20 to 25 mph with gusts up to 45 mph are possible from Baker County through the Lower Treasure Valley

...DRY COLD FRONTAL PASSAGE SATURDAY... Critical fire weather conditions as a dry cold front moves through the region. Winds begin to rise Saturday afternoon, although mostly remain 15 to 20 mph with 25 to 30 mph gusts. At the same time, minimum RHs across the area are well below 20%, down to 10% in the high desert. Winds increase overnight as RHs begin to rise out. Winds 20 to 25 mph with gusts up to 45 mph are possible from Baker County through the Lower Treasure Valley

...DRY COLD FRONTAL PASSAGE SATURDAY... Critical fire weather conditions as a dry cold front moves through the region. Winds begin to rise Saturday afternoon, although mostly remain 15 to 20 mph with 25 to 30 mph gusts. At the same time, minimum RHs across the area are well below 20%, down to 10% in the high desert. Winds increase overnight as RHs begin to rise out. Winds 20 to 25 mph with gusts up to 45 mph are possible from Baker County through the Lower Treasure Valley

* WHAT...Dangerously hot conditions with heat index values up to 110 expected, and overnight low temperatures in the 80s. * WHERE...Arches/Grand Flat and Canyonlands/Natural Bridges. * WHEN...From noon Saturday to 9 PM MDT Monday. * 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.

* WHAT...Dangerously hot conditions with temperatures of 100 to 110 expected. * WHERE...Apple and Lucerne Valleys. * WHEN...Until 8 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Temperatures will range from 102 to 108 for Lucerne Valley westward, and 108 to 112 near Johnson Valley. 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 high temperatures of 115 to 120 expected. * WHERE...Coachella Valley, San Diego County Deserts, and San Gorgonio Pass near Banning. * WHEN...Until 8 PM PDT Monday. * 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.