Alberta officials scrambled Tuesday to contain dozens of forest fires that have destroyed hundreds of homes and forced the evacuation of thousands, and are now shutting down an increasing amount of the province's oil output.

High winds in the last week have complicated fire fighting, Alberta officials said. The fires are seasonal and so far aren't among the province's worst. But unpredictable winds grounded helicopters and water-bombing aircraft earlier in the week, forcing one of the most dramatic evacuation's in the province's history. The 7,000 residents of Slave Lake, about 100 miles north of the capital here, abandoned the burning town in a matter of hours Sunday night and Monday morning.

On Tuesday, a parade of oil companies said they had shut down production as they evacuated staff from the area. Royal Dutch Shell Group PLC's Canadian division said it would stop production at two affected fields, which together produced about 10,000 barrels a day last year.

Canadian Natural Resources Ltd. said it evacuated 1,300 workers from one of its facilities as fires approached. It said firefighters had so far protected its site. The company shut down some oil production in another location because of the proximity of fires. Pengrowth Energy Corp. said Tuesday it had shut in 5,000 barrels a day of production.

No casualties or injuries have been reported.

Alberta's oil industry was already reeling from slowdowns forced by a large oil spill on a key pipeline in the province. Plains All American, the operator of the line, shut a chunk of it down after a leak earlier this month spilled 28,000 barrels--the worst oil spill in Canada since 1975. This week, Plains shut down the remainder of the line due to the wildfires.

It's unclear how much total production has been bottled up by the fire.

Mel Knight, Alberta's minister of sustainable resource development, said that 41 fires were raging across the province, including 12 that were still out of control.

In an interview in his office, Mr. Knight said 1,000 firefighters were battling blazes; more than a dozen water-bombing aircraft had been deployed; and more than 100 helicopters were flying fire-fighting sorties.

"We'll get the situation under control," he said.

Residents of Slave Lake were still recovering Tuesday from what for some turned out to be an all-night scramble to escape towering flames that surrounded the town.

Early Sunday, authorities had ordered a limited evacuation of the town. But a sudden wind shift later in the day sent an out-of-control fire roaring through the community's center and southern suburbs.

A ribbon of cars and trucks, packed with what few belongings families could collect, crawled from the town through the night along the only road that remained open. Officials said a third of the town's building were destroyed.

On Tuesday, hundreds of miles to the northeast, residents of Fort MacKay said smoke from a nearby fire had reduced visibility in the town. Limited evacuations of sick and elderly started early in the day.

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