Several days of heavy rain followed a heavy snow fall. Ice packs on roofs prevented trapped rain water from draining. Several roof collapses occurred. The most significant was the roof collapse at the Toys R Us store in New Carrollton. The collapse happened during business hours and without warning. It was not known if anyone was trapped under the rubble. Technical rescue teams with cadaver dogs responded to assist in the search effort. The search effort was compounded by broken gas and water lines. Metro Support Unit 5 and Chief James McClelland, responding as the Volunteer Operations Chief, responded on the initial alarm. Truck 5 was later dispatched to assist with a thermal imaging camera. No victims were found.