ANCHORAGE, Alaska (AP) _ Hundreds of firefighters on Sunday battled 85 wildfires raging over more than 330,000 acres of brush and forest in Alaska, and officials said blazes have scorched more than 440,000 acres so far this year.

Most of the fires were started by lightning, and many are allowed to burn themselves out because it would be too costly to fight them, according to officials of the U.S. Bureau of Land Management and the state Division of Forestry.

More than 770 firefighters were fighting the blazes on Sunday.

Since the beginning of the year, 680 fires have been reported.