Yosemite National Park campgrounds close due to flood threat and summer setbacks.

Three popular campgrounds in Yosemite National Park will be temporarily closed due to a forecast of flooding as warming temperatures melt the Sierra Nevada's massive snowpack. The National Weather Service issued a flood watch for the area until at least Friday. The park officials said that the Lower and North Pines Campgrounds and the Housekeeping Camp will be shut over fears that waterways could overspill their banks. The Merced River may remain above flood stage for some time due to extended hot weather and abundant snow.