The concessionaire that handles Yosemite's lodging has reported a 20-percent cancellation rate over the holiday weekend. Usually, Labor Day is sold out.
Most of the cancellations were for Curry Village, which has been shut down anyway due to the hantavirus outbreak.
Six people who stayed in the Curry Village cabins this summer have contracted the virus, and two of them have died. Up to 10,000 people may have been exposed to the deadly mouse-borne virus at the park, officials said.
Hantavirus can be carried in the urine, saliva and feces of infected deer mice. Humans typically contract the disease by breathing in the rodent feces or urine.
Yosemite National Park has set up a non-emergency phone line for all questions and concerns related to hantavirus in Yosemite at (209) 372-0822. It will be staffed from 9 a.m. to 5 p.m. daily.