Thousands are crowding into free national parks. And workers are terrified of coronavirus.

Two days before he cursed a supervisor and quit the National Park Service job he loved, Dustin Stone arrived to work in a foul mood. A decision by Interior Secretary David Bernhardt to keep national park sites open despite the coronavirus outbreak left him angry and in disbelief.

The virus hasn’t reached Skagway, a tiny town on the Alaskan panhandle where Stone lives and worked at the Klondike Gold Rush National Historical Park. But if it does, he said, it could be a disaster. “I’ve lived here year-round through eight flu seasons, and I’ve seen how quickly an infection can spread,” he said. “When one of us gets sick, most of us get sick.” There’s no full-time doctor and no hospital in Skagway. A single community health clinic has a registered nurse and assistants.