Fires are continuing to spark in the West as a heat wave blankets millions of residents.

       Heat alerts are currently active across seven states in the West as the heat wave continues into Sunday. Temperatures in the triple digits are expected in California, Arizona, Oregon and Idaho. Temperatures are set to break records in cities like Flagstaff, Arizona; Salt Lake City, Utah; Bakersfield and Fresno, California; and Billings, Montana.

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       Extreme drought and dry conditions are persisting in the West as another heat waves looms, creating matchbox conditions for any spark to ignite into a fast-moving blaze. Dozens of large wildfires are currently burning in the West.

       The entire state of California is in drought and 85% is in extreme drought, while nearly two-thirds of Utah is in exceptional drought, and more than one-third of Washington state is in extreme drought, according to the U.S. Drought Monitor.

       In California and Nevada, temperatures in the 90s and 100s -- along with single digit humidity values -- will be conducive to rapid spread again on Sunday.

       Noah Berger/AP

       A firefighter sprays water while trying to stop the Sugar Fire, part of the Beckwourth Complex Fire, from spreading to neighboring homes in Doyle, Calif., July 10, 2021.

       The Beckwourth Complex Fire in Doyle, California, has become the state's largest wildfire of 2021 at more than 86,000 acres and is only 8% contained, according to the U.S. Forest Service. The fire prompted mandatory evacuations, closed portions of U.S. Route 395 and has nearly crossed state lines into Nevada, ABC Sacramento affiliate KXTV reported.

       Mario Tama/Getty Images

       A person exercises in the morning heat near a forest fire prevention sign, July 10, 2021, in Palm Springs, California.

       Winds of up to 20 mph fueled the fire in regions along the northern Sierra Nevada, The Associated Press reported. The air was so dry that some of the water dropped by aircraft to combat the fire evaporated before it reached the ground, according to AP.

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       The Bootleg Fire in Klamath County, Oregon, grew to more than 143,000 acres on Sunday, prompting evacuations in the area, according to the U.S. Forest Service. It was first spotted in the Fremont-Winema National Forest on July 6 but exploded to 75,000 acres on Saturday, ABC Portland affiliate KATU reported.

       Evacuations were also ordered due to the Rock Creek Fire in Craig, Montana, which shut down portions of Interstate 15.

       Ty Oneil/SOPA Images via Zuma Press

       Flames illuminate the smoke rising from the Beckwourth complex fire in Beckwourth, California, July 9, 2021.

       The possibility of isolated thunderstorms in Montana on Sunday afternoon could bring breezy conditions and also cause lightning ignitions.

       The worst of the heat wave will wrap up Sunday, and the extreme heat will subside over the next few days.