ENTIAT, Wash. - One central Washington wildfire has burned across 28 square miles in just two days while another has broken out in hot, tinder-dry conditions.

The Mills Canyon fire near Entiat has burned across more than 18,000 acres since it started Tuesday, fire spokesman Rick Scriven said Thursday evening. The fire is a little bigger than the city of Renton.

Residents of about a dozen homes have been told to evacuate, while more than 200 other homes were threatened.

Just over 400 firefighters are battling the fire burning at Mills Canyon Thursday, up from 250 on Wednesday. They were aided by air tankers dropping retardant and helicopters dropping water.

As of Friday morning, the fire was 19 percent contained.

A 30-mile stretch of U.S. Highway 97A reopened Thursday after being closed for 24 hours by the fire.

About 650 firefighters are now working the Mills Canyon Fire.

Firefighters from all over the state have come in to protect the structures, Mills Canyon fire spokesman, Joe Anderson, said Thursday afternoon.

No homes have burned, and there have been no injuries, he said.

The Mills Canyon fire was sparked by a house fire Tuesday in the Mills Canyon area and quickly spread.

WATCH: Mills Canyon Fire jumps to 10,000 acres

Fire evacuation levels (Source: Chelan County Fire Dist. 1)

Level 1 evacuations are an alert. Residents should be aware of the danger that exists, and monitor local media outlets for information. Residents with special needs, or those with pets or livestock, should take note and make preparations for relocating family members, pets, and livestock.

Level 2 evacuations indicate there is a significant risk to your area, and residents should either voluntarily relocate to a shelter or with family/friends outside of the area, or, be ready to leave at a moments notice.

Level 3 means danger is currently affecting your area or is imminent, and you should leave immediately.

Other fires burning in Washington:

  • Rock Hill Fire: Douglas County. 2,200 acres. Should be 100 percent contained by Friday.
  • Trinidad Fire: Near Quincy along Highway 28. 800 acres. 10 percent contained
  • Palisades Flats Fire: 25 miles east of Wenatchee. 100 acres.
  • Lake Spokane Fire: South of Springdale. 225 acres.
  • Near Bridgeport: 400 acres. Seven homes on Level 2 evacuation.
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