I read yesterday that Mammoth Lakes is operating a check point somewhere on the road entering town. If you're not a resident, you're not allowed to enter. At least one local case of COVID-19, IIRC. 17 bed hospital with two ICU beds. Anyone who is seriously injured or ill in Mammoth is evacuated by air, usually to LA. That's weather permitting. The local head of the health department and the chief MD for the hospital are urging people to stay away. They said the same thing pertains to the entire Owens Valley area: sparse population with scaled down infrastructure compared with a medium sized city.