YOSEMITE NATIONAL PARK, Calif. — A relatively cool and humid Labor Day allowed fire crews to make major progress Monday toward corralling a massive wildfire searing the edge of Yosemite National Park.

The fire was 70 percent contained at nightfall, up from 45 percent some 24 hours earlier. The blaze now covers 368 square miles.

Fire weather was still classified as extreme with temperatures above 90 degrees and winds in some spots gusting at 20 mph, but Monday was cooler than many recent days, with more moisture and cloud cover. Full containment is not expected until Sept. 20.

The blaze started Aug. 17 in the Stanislaus National Forest.