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‘Hard days ahead’: U.S. prepares for explosive wildfire growth amid hot, dry weather

Click to play video: 'Dixie fire continues to burn in California as new evacuations ordered'
Dixie fire continues to burn in California as new evacuations ordered
WATCH: Dixie fire continues to burn in California as new evacuations ordered – Aug 4, 2021

California’s largest wildfire continued to grow Wednesday while thousands of firefighters prepared for a tougher fight as dangerous weather returns.

A red flag warning was issued through Thursday because of hot, bone-dry conditions with winds up to 64 kph. That could drive flames through timber, brush and grass, especially along the northern and northeastern sides of the vast Dixie Fire.

“I think we definitely have a few hard days ahead of us,” said Shannon Prather with the U.S. Forest Service.

Click to play video: 'Dozens of wildfires rage out of control in western U.S.'
Dozens of wildfires rage out of control in western U.S.
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Firefighters were able to save homes and hold large stretches of the blaze. But flames jumped perimeter lines in a few spots Tuesday, prompting additional evacuation orders for about 15,000 people east of Lake Almanor, fire officials said.

Firefighters were protecting the small Northern California mountain community of Greenville as the 3-week-old fire grew to over 1,108 square kilometres across Plumas and Butte counties.

Heat from the flames created a pyrocumulus cloud, a massive column of smoke that rose 30,000 feet in the air, said Mike Wink, a state fire operations section chief.

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Dawn Garofalo watched the cloud grow from the west side of the lake, where she fled with a dog and two horses, from a friend’s property near Greenville.

Click to play video: 'What’s fanning the wildfires in US states?'
What’s fanning the wildfires in US states?

“There’s only one way in and one way out. I didn’t want to be stuck up there if the fire came through,” Garofalo said.

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From her campsite on the lake bed, she watched the fire glowing on the horizon before dawn. “The flames were huge. They must have been 500 feet high. Scary,” she said.

The fire has threatened thousands of homes and destroyed 67 houses and other buildings since breaking out July 14. It was 35 per cent contained.

About 240 kilometres to the west, the lightning-sparked McFarland Fire threatened remote homes along the Trinity River in the Shasta-Trinity National Forest. The fire was only 5 per cent contained. It had burned fiercely through nearly 65 square kilometres of drought-stricken vegetation.

Similar risky weather was expected across Southern California, where heat advisories and warnings were issued for interior valleys, mountains and deserts for much of the week.

Heat waves and historic drought tied to climate change have made wildfires harder to fight in the American West. Scientists say climate change has made the region much warmer and drier in the past 30 years and will continue to make weather more extreme and wildfires more frequent and destructive.

More than 20,000 firefighters and support personnel were battling 97 large, active wildfires covering 7,560 square kilometres in 13 U.S. states, the National Interagency Fire Center said.

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Montana on Tuesday had 25 active large blazes, followed by Idaho with 21 and Oregon with 13. California had 11.

Click to play video: 'Wildfire smoke from the west spreads to U.S east coast'
Wildfire smoke from the west spreads to U.S east coast

In Hawaii, firefighters gained control over the 160-square-kilometre Mana Road Fire that forced thousands of people to evacuate over the weekend and destroyed at least two homes on the Big Island.

Oregon’s Bootleg Fire, the nation’s largest at 1,676 square kilometres, was 84 per cent contained. Firefighters were busy mopping up hot spots and strengthening fire lines.

“Crews are working tirelessly to ensure we are as prepared as we can be for the extreme fire weather forecast for the next couple days,” a U.S. Forest Service update said.

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This version corrects the name of the blaze in Hawaii to the Mana Road Fire, not the Nation Fire.

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