The massive coronavirus outbreak at San Quentin prison is threatening to overwhelm Marin County hospitals. So say county supervisors in a letter to Governor Newsom, asking him to help. The Board wants the state to establish a COVID-19 treatment facility on the prison grounds instead of transferring the sickest inmates to local hospitals. The county health director says many hospitals in the region are now refusing to accept any more inmates. As of last night, San Quentin had about 1,100 coronavirus cases, more than a third of its population. Assemblyman Marc Levine calls it the biggest prison catastrophe in state history.