UTAH: A wildfire which has already killed three people could burn all summer.

Issuing the warning, a fire service spokesman said the deadly blaze had charred more than 62 square miles since it erupted on Friday in the Ashley National Forest.

More than 700 firefighters have joined the battle, with more expected to arrive to help protect homes and control the blaze.

Fire officials want to let it continue to burn in parts of the national forest to clear dead trees.