Authorities say a firefighter was injured and residents in two cities were ordered to evacuate Saturday as a wildfire grew in Washington state.

Authorities say the Grass Valley fire started Saturday morning and windy conditions helped it grow to 1.5 square miles. The fire is burning in grass and timber.

Parts of Grand Coulee and Coulee Dam in central Washington are under a Level 3 evacuation notice. Level 3 means immediate danger - residents are advised to load your family and pets into their vehicles and GO NOW. Evacuees are being told to go to Wilbur High School.

Grant County Sheriff's Office spokesman Kyle Foreman tells the Spokesman -Review that the injured firefighter was flown to Seattle's Harborview Medical Center.

No other details on the firefighter were available.

The State Fire Marshall's Office says the fire started near Mansfield in Douglas County. The cause of the fire is under investigation.