2 Arizona firefighters killed in plane crash as wildfires rage on in western U.S.

Firefighters working in searing weather struggled to contain a Northern California wildfire that continued to grow Sunday and forced the temporary closure of a major highway, one of several large blazes burning across the U.S. West amid another heat wave that shattered records and strained power grids.

In Arizona, two firefighters died Saturday after a plane they were in crashed during a survey of a small wildfire in rural Mohave County. The Beech C-90 aircraft was helping perform reconnaissance over the lightning-caused Cedar Basin Fire, near the tiny community of Wikieup, when it went down around noon.

The two firefighters were the only people on board. Officials identified one of them as Jeff Piechura, a retired Tucson fire chief who was working for the U.S. Forest Service. The name of the other was withheld until relatives could be notified. The National Transportation Safety Board is investigating the crash.

In California, officials asked all residents to reduce power consumption quickly after a major wildfire in southern Oregon knocked out interstate power lines, preventing up to 5,500 megawatts of electricity from flowing south into the state.

The California Independent System Operator, which runs the state’s power grid, said Saturday the Bootleg Fire took three transmission lines off-line, straining electricity supplies as temperatures in the area soared.

“The Bootleg Fire will see the potential for extreme growth today,” the National Weather Service in Medford, Ore., tweeted Sunday.

Fire burns along a power pole as the Sugar Fire tears through central Doyle, Calif., on Saturday. (Noah Berger/The Associated Press)

Pushed by strong winds, the blaze exploded to 580 square kilometres as it raced through heavy timber in Oregon’s Fremont-Winema National Forest, near the Klamath County town of Sprague River.

Erratic winds a concern

To the southeast, the largest wildfire of the year in California was raging near the border with Nevada. The Beckwourth Complex Fire — a combination of two lightning-caused blazes burning 72 kilometres north of Lake Tahoe — showed no sign of slowing its rush northeast from the Sierra Nevada forest region after doubling in size between Friday and Saturday.

Late Saturday, flames jumped the U.S. 395 highway, which was closed near the small town of Doyle in California’s Lassen County. The lanes reopened Sunday, and officials urged motorists to use caution and keep moving along the key north-south route where flames were still active.

“Do not stop and take pictures,” said California Incident Management operations section chief Jake Cagle. “You are going to impede our operations if you stop and look at what’s going on.”

Flames from a wildfire burn along Oregon 138 near Steamboat, Ore., on Wednesday. (Oregon Department of Transportation/The Associated Press)

Cagle said structures had burned in Doyle, but he didn’t have an exact number. Bob Prary, who manages the Buck-Inn Bar in the town of about 600 people, said he saw at least six houses destroyed after Saturday’s flareup. The fire was smoldering Sunday in and around Doyle, but he feared some remote ranch properties were still in danger.

“It seems like the worst is over in town, but back on the mountainside the fire’s still going strong. Not sure what’s going to happen if the wind changes direction,” Prary said. Erratic winds were a concern for firefighters, Cagle noted, with gusts expected to reach 32 km/h.

The blaze, which was only nine per cent contained, increased to 339 square kilometres. Temperatures in the area could top 37 C again Sunday.

Temperatures reach 53 C in Death Valley

It was one of several fires threatening homes across Western states that were expected to see triple-digit heat through the weekend as a high-pressure zone blankets the region.

Death Valley in southeastern California’s Mojave Desert reached 53 C on Saturday, according to the National Weather Service’s reading at Furnace Creek. The shockingly high temperature was actually lower than the previous day, when the location reached 54 C.

Death Valley also recorded a 54 C day in August of last year. If that reading and the one Friday are confirmed by experts as accurate, they will be the hottest highs recorded there since July 1913, when the Furnace Creek desert hit 57 C, considered the highest measured temperature on Earth.

A fan cools a rescue horse at Coachella Valley Horse Rescue in Indio, Calif., on Sunday. The well that supplies running water to the rescue broke, and the rescue has been relying on water donations from the community and local fire department to keep its 18 horses alive amid a heat wave in California. (Mario Tama/Getty Images)

The National Weather Service warned the dangerous conditions could cause heat-related illnesses.

Palm Springs in Southern California also hit a record-high temperature of 49 C Saturday, while Las Vegas tied the all-time record high of 47 C.

NV Energy, Nevada’s largest power provider, also urged customers to conserve electricity Saturday and Sunday evenings because of the heat wave and wildfires affecting transmission lines throughout the region.

In Idaho, Gov. Brad Little mobilized the state’s National Guard to help fight fires sparked after lightning storms swept across the drought-stricken region.

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