This situation will require the response of several ambulances to treat and transport the injured. Additional ambulances should be positioned to receive victims recovered during search operations and to provide advanced life support to any first responders who suffer injuries. Depending on the actual number of injuries, the incident commander should consider a mass casualty incident (MCI) response.
As multiple structures are involved in this unstable situation and residents have not been accounted for, a multiple-alarm response to provide sufficient resources and equipment would be required. Several other agencies including police, Department of Public Works (DPW) and National Grid should be integrated into a unified command structure.
Please see Module 4, Universal response tactics, What NOT to do