Disney just announced the cancellation of hotel reservations through Sept 26. New reservations can be made starting October 1.
Guests will not be charged Disney-imposed modification or cancellation fees during this time. Reservations will be canceled without any penalties or fees if a guest neglects to make changes to the reservation.
Be sure to cancel other non-Disney reservations as this policy only affects people who have booked at a Disneyland Resort hotel.
More info in The Lounge.