CASTAIC, Calif. (AP) — Firefighters fought to maintain the upper hand on a huge and rapidly moving wildfire that swept through rugged mountains north of Los Angeles and resulted in more than 50,000 people being put under evacuation orders or warnings.

A new wildfire spread rapidly on Wednesday in a mountainous area north-west of Los Angeles, prompting evacuation orders for 50,000 residents as the region entered its third week of battling devastating blazes.