A fast-moving wildfire exploded to roughly 10,200 acres near the Los Angeles County community of Castaic Wednesday morning, prompting mandatory evacuation orders and road closures, authorities said.

Amid an extended red flag warning, a new fire exploded north of Castaic. Evacuations were ordered after 11 a.m. Wind gusts reached 31 mph Wednesday afternoon in the area and are expected to increase over the next several hours.

The Hughes Fire has spread over 8,096 acres after starting just before lunchtime in Los Angeles County's Castaic Lake area on Wednesday.