The latest on wildfires in Northern California (all times local):

9:23 a.m.

Crews gained a bit of ground against a wildfire in Northern California that destroyed 15 structures and was threatening at least 6,400 others in mountain towns southeast of Sacramento.

Authorities say containment of the 101-square-mile fire increased to 10 percent Saturday morning. It started Wednesday and quickly exploded in size, chasing hundreds of people from their homes and into evacuation centers.

There are 3,000 firefighters assigned to the blaze and more expected to arrive throughout the day.

At Angels Camp, a quaint town made famous by Mark Twain's "The Celebrated Tale of the Jumping Frog of Calaveras County," incident commanders huddled behind a pickup truck loaded with maps assessing the fire's progress as a line of horse trailers lined up near a corral with about two dozen horses.