Yellowstone Park fire 20 percent contained

Yellowstone National Park, Wyo. – Firefighters have contained about 20 percent of a 385-acre wildfire burning in windy conditions near the center of Yellowstone National Park.

The fire is located seven miles southwest of the Bridge Bay Campground. Park officials say all roads and trails remain open.

Hot shot crews, helicopters and two air tankers have been fighting the fire since Monday. The blaze was about a half acre when it was first spotted Sunday, but gusty winds drove it to about 385 acres by Monday afternoon.

Officials don't know yet how the fire started. It's the fourth fire this year in Yellowstone.

Also in western Wyoming, fire manages elevated the fire danger to "high" on Tuesday for Grand Teton National Park and the Bridger-Teton National Forest in response to dry vegetation, high temperatures and afternoon winds.