Wildfire spreads in Wyoming forest land

WILSON, Wyoming (CNN) -- A wildfire burning national forest land in the northwest part of Wyoming grew to 2,250 acres overnight, and fire officials called in more resources to fight the blaze.

Nearly 700 people are now battling the fire south of Wilson in the Bridger-Teton National Forest, fire officials said Thursday, and more are to continue to arrive throughout the day. Though the fire had grown in acreage, it remained 10 percent contained, officials said.

The towns of Jackson and Jackson Hole were not threatened by the fire, said fire information officer Joan Anzelmo, and Grand Teton and Yellowstone National Parks were open and unaffected.

About 100 homes remained evacuated Thursday as the fire crept closer to them. Red Cross spokeswoman Kelly Donaghy said most of the families had found temporary housing with friends, and about 14 families had spent the night in hotels.

A shelter that was opened at Jackson Hole High School in Jackson, about 10 miles east of Wilson, will remain available if more evacuations are called, Donaghy said.

The blaze, dubbed the Green Knoll Fire, began Sunday in the national forest. It was unclear what caused it.

Twelve helicopters, eight tankers and four planes were fighting the fire from the air Thursday, while nine bulldozers and more than 30 fire engines were being used on the ground.