Three wildfires north of Flagstaff, Arizona, are continuing to burn unrestrained as weather this week could worsen conditions for firefighters fighting the blaze.

The pipeline fire had been reported just after 10 a.m. on Sunday, a little over six miles north of Flagstaff, Ariz.

The pipeline fire, about six miles outside the city,, has scorched about 25.000 acres up until Monday afternoon, according to a briefing on the wildfire information site InciWeb, and Two other smaller fires nearby, the Haywire Fire and the Double Fire, have increased and are expected to merge, InciWeb said.

Winds reached winds of up to 50 mph on Monday, adding fuel to the pipeline fire, as it spread to the scars of the 2010 Schultz fire and the April tunnel blablaze in which over 20 homes have been destroyed.

All three fires were under zero percent contained through Monday afternoon, according to upgrades from Coconino National Forest, and authorities closed access to almost all of the northern part of the forest.

The Haywire and Doubles fires are expected to merge, all three of them working together the response to the pipeline fire, Smith said.

Authorities in Coconino County evacuated hundreds of homes on Sunday because of the pipeline fire, urging thousands more to prepare for evacuations.

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