Waikoloa, Hawaii ? Brush fires that appeared to be the work of arsonists burned out of control Sunday along the coast of Hawaii’s largest island, sending hundreds of people fleeing inland, officials said.

No homes were damaged and no one was injured, but officials on the Big Island worried the fires could approach residential areas with a slight change in Hawaii’s temperamental breezes, said Duane Hosaka, staff officer for Hawaii County Civil Defense.

Nine fires appear to have been set in dry grasses along coastal roads early Sunday, Hosaka said. The evacuation order affected an estimated 400 people.

The blazes covered more than 3 square miles, and more than 60 fire departments were involved.