MARIPOSA, Calif. (AP) – A deadly forest fire continues to spread in the Sierra Nevada west of Yosemite National Park. The U.S. Forest Service says the blaze is 27 square miles (70 square kilometers) Wednesday morning. It’s just 5 percent contained. More than 1,800 firefighters are battling the blaze in Mariposa County that started Friday. The growing flames shut down a key route into the park at the peak of tourist season. It also led to mandatory evacuations in nearby communities. But all trails, campgrounds, restaurants and lodges at Yosemite National Park remain open, though smoke from the wildfire is polluting the air and limiting visibility. Forecasters expect monsoonal moisture to push in from the south, creating afternoon thunderstorms that can produce erratic, gusty winds that can be dangerous for firefighters.