35 PA.C.S. 7704(b)
Liability: Providing Shelter
An individual who owns or controls real estate and, voluntarily and without compensation, allows the use of the real estate for emergency services purpose will not be held legally responsible for causing the death or injury to a person on the real estate or the loss or damage to a person's property while on their real estate.
Immunity from civil liability
(b) Real estate owners. — Any person, organization or authority owning or controlling real estate or other premises, who voluntarily and without compensation, grants a license or privilege or otherwise permits the designation or use of the whole or any part or parts of the real estate or premises for any emergency services purpose, shall, together with his successors in interest, if any, not be civilly liable for negligently causing the death of or injury to or loss or damage to the property of any person who is upon the real estate or other premises for that purpose.