The US National Weather Service on Thursday forecast scattered showers and storms for parts of central and eastern US through the end of the week due to the presence of a frontal boundary.
Meanwhile, the Intermountain West region is expected to experience the intensification of dangerous heat conditions, which are expected to spread to central US by early next week, the agency said.
The Northern/Central Plains are likely to face elevated wildfire conditions, while persistent air quality issues are forecast in the Northwest.
The NWS early Thursday issued a red flag warning for Wyoming's Baggs, Muddy Gap, Rawlins, Saratoga, Elk Mountain, Medicine Bow, Shirley Basin, Garrett, Bosler, Centennial, Chugwater, Pine Bluffs, Cheyenne, Glenrock, Glendo, Douglas, Bill, Lance Creek, Lusk, and Torrington.
Wyoming mostly falls under the service area of PacifiCorp's Rocky Mountain Power.
A similar warning was raised for Colorado's Buena Vista, Gunnison, Lake City, Montrose and areas near Pagosa Springs and Alamosa. Xcel Energy (XEL) and Black Hills (BKH) unit Black Hills Energy are the primary electricity service providers in the state.
Red flag warnings were also issued for Montana's Glasgow, Glendive, Miles City, Terry, Circle, Jordan, Winnett, Ekalaka, Sidney, and parts of Malta; South Dakota's Buffalo, Belle Fourche, Hot Springs, Edgemont, and Custer; and Oregon's Cave Junction, Ashland, Medford, Grants Pass, Shady Cove.
MDU Resources (MDU) unit Montana-Dakota Utilities and Northwestern Energy (NWE) are the major service providers in Montana, while Xcel Energy, NorthWestern Energy, Montana-Dakota Utilities, Otter Tail (OTTR) subsidiary Otter Tail Power, and Black Hills Energy are among the major electric utility service providers operating in South Dakota. Affected areas in Oregon mostly fall under the service area of PacifiCorp's Pacific Power.
Also covered under a red flag warning watch were Williston, Dickinson, Bowman, and Elgin in North Dakota, where Xcel Energy, Montana-Dakota Utilities, and Otter Tail Power are the major electric utility service providers.
In California, a red flag warning was raised for Happy Camp, Fort Jones, and areas near Yreka and Willow Creek. Meanwhile, an extreme heat warning was issued for Blythe, El Centro Imperial, Palm Springs, Palmdale, Twentynine Palms, Barstow, Baker, Death Valley, Bishop, Tehachapi, Mount Laguna, Julian, Borrego Springs, Beaumont, Indio, Victorville, Ridgecrest, Edwards AFB, Frazier Park, and parts of Santa Barbara and Santa Maria.
Pacific Power, PG&E (PCG) subsidiary Pacific Gas and Electric, Edison International's (EIX) Southern California Edison, and Sempra Energy (SRE) unit San Diego Gas & Electric are the major electricity service providers in these places.
An extreme heat warning was also raised for Wells, Tonopah, Beatty, Las Vegas, and Caliente in Nevada, which falls under the service area of Berkshire Hathaway Energy unit NV Energy.
Affected areas in Utah included St George, Bryce Canyon National Park, Zion National Park, Escalante, Capitol Reef National Price, Green River, Price, Delta, Nephi, Wendover, Tooele, Ogden, and areas near Bluff. Rocky Mountain Power is the primary service provider in the state.
In Arizona, the NWS issued an extreme heat warning for Parker, Kingman, Lake Havasu City, Yuma, Bullhead City, Gila Bend, Phoenix, Wickenburg, Dateland, Casa Grande, Page, and Grand Canyon Village. Meanwhile, a flash flood warning was raised for Sells, Sierra Vista, Green Valley, Tucson, Bisbee, and Benson.
Arizona is primarily served by Pinnacle West Capital (PNW) unit Arizona Public Service Company, and UNS Energy subsidiaries Unisource and Tucson Electric Power.
Flash flood warnings were also raised for Morristown in New Jersey and Tucumcari in New Mexico.
In Missouri, the NWS issued a flood warning for Clinton, Harrisonville, Boonville, and areas near Columbia. Evergy (EVRG), Ameren's (AEE) Missouri unit, and Algonquin Power & Utilities (AQN) subsidiary Liberty are the major service providers in the state.
A flood warning was also issued for George West in Texas, served by American Electric Power's (AEP) Texas unit.