A fast-moving wildfire reached the outskirts of Marseille, France’s second-largest city, on Tuesday, leading its airport to be shut down, with residents told to stay indoors and shut all openings to be safe from the smoke.

Flames licked the outskirts of Marseille on Tuesday, with residents warned to stayed inside, close doors and keep roads clear for emergencies.

A wildfire that had reached the northwestern outskirts of France’s second city of Marseille lost intensity overnight on Wednesday, but the airport was expected to close as firefighters continued to battle the flames.