PALMDALE, Calif. - Fire crews working through the night beat back flames and built containment lines around a two-day old wildfire that charred nearly 22 square miles of brush in the high desert north of Los Angeles.

The blaze was 62 percent contained Saturday morning and no structures were threatened, according to Los Angeles County Fire Capt. Sam Padilla.

Crews hoped to close the fire's south flank near Portal Ridge, Rancho Vista and Ana Verde before temperatures rise into the high 90s and dry winds whip up again as expected Saturday.