Hundreds of fire-fighters are continuing to battle wildfires that are burning out of control in the Western United States.

Two more fires in Northern California have led to the closure of roads and forced the evacuation of 480 homes. Extreme weather has led to wildfires across 13 states west of the Mississippi River.

A fire in Washington state has burnt down about 70 homes and scorched more than 100 square kilometers of grassland. In California...more than 400 people had to be evacuated from their homes, as Marines joined eight thousand firefighters in the battle against the blazes.

The large fires have mostly been in isolated, sparsely populated areas. But authorities say the unpredictable weather conditions mean the fires are still very dangerous.

Hundreds of fire-fighters are continuing to battle wildfires that are burning out of control in the Western United States.