A CAMPER was arrested for allegedly starting a 55,000-acre fire that has gobbled swaths of Sequoia National Park and threatened some of the most treasured trees in the American forest system.

Fire crews finally made progress against the worst wildfire in Arizona’s history yesterday, but swirling winds raised fears of more blazes.

An explosive 500-square-mile wildfire has burned practically to the doorstep of the evacuated US mountain town of Show Low, Arizona, as crews fought to hold back the flames.