Campers and hikers started filtering back into Yosemite Valley on Sunday as the gates to the roadways reopened, park officials said, after a powerful storm submerged roads and shut down portions of Yosemite National Park.

The park’s lodging, campgrounds and roads in Yosemite Valley were closed Friday because of potential flooding from the atmospheric river that washed over Northern California.

Several campsites that flooded during the rain stayed closed, campground ranger Chris Knight said, but two campgrounds were open Sunday and more were expected to become accessible by Monday.

“It’s business as usual,” Knight said. “It’s unclear how busy it’ll be, but people are definitely coming back.”

At its heaviest Saturday, the storm submerged roads throughout the valley in 2 to 4 feet of water, park officials said. The water level of the Merced River surged past the flood stage of 10 feet, reaching 13.73 feet at Pohono Bridge on Saturday.

“All the meadows were basically lakes,” said Knight, who has lived in the valley for the past five years. “You couldn’t get up close to see what the river looked like. It was the highest I’ve ever seen.”

By Sunday morning, most of the water had receded, officials said, and park crews were working to clear water, rocks and debris from the roads. Access to some areas and services in Yosemite could be delayed or limited as cleanup continues, park officials said.

In the Bay Area, Muir Woods National Monument was closed to cars and visitors on Saturday because of flooding, but the National Park Service tweeted that the park reopened Sunday.

But Stinson Beach, which was also shut off to visitors and cars because of storm damage Saturday, remained closed to vehicles on Sunday. A huge portion of the main beach parking lot collapsed under the deluge, turning a small stream into a surging river that created what looked like a mini-Niagara Falls where cars usually park.

The new current damaged parts of the popular Parkside Cafe, but the main restaurant was spared and stayed open for customers.

With the collapsed lot out of commission, parking has become incredibly tight in the little town, said Laurie Ellis, who works at Stinson Beach Books. Still, she said, business did not seem to be slowing down.

“There’s a river going through the lot now,” Ellis said. “The creek that used to flow there now cuts across the parking lot, and it swept all the tables into the ocean.”

The National Park Service said a reopening date for vehicles to the beach at Stinson would be determined after a complete damage assessment.

No major flood risks were expected from the storm’s residual runoff, National Weather Service meteorologist Steve Anderson said.

Light rain is forecast for Tuesday and Wednesday, Anderson said, adding that the showers would be nothing like the soaker that drenched the Bay Area over the weekend.

“Absolutely not,” Anderson said. “There’s no significant rain expected in the near future.”

The storm, which dropped 3.43 inches of rain on San Francisco, helped bring the city to 78 percent of its normal seasonal rainfall, up from 63 percent Thursday.