The first day of classes in Hillsborough County schools will be canceled because of the coronavirus outbreak, the district announced Thursday.

The district says it has more than 8,000 employees on the ground working in schools in the county.

The district says that includes about 800 health professionals, and 1,400 administrators.

More than 2,400 schools have been closed due to the virus, which is spreading rapidly in the United States.

The number of schools closing nationwide has doubled to more than 7,500.