Trip and fall hazards and electrical hazards are most probable. Caution and protective clothing are mitigating measures. Staff making initial entries into buildings should proceed with great caution. A major lesson learned from tornado disasters is to expect roads to be strewn with debris. Rescue vehicles will be either blocked from reaching the injured or their tires will be punctured.
Street sweeping is an early priority.
There may be spoiled food in the cafeteria freezers, chill box, and pantry. Also, vending machine food may be spoiled or contaminated. There may be sewage backup through floor drains, sinks, and toilets. Sewage-line breaks may create pools of raw sewage on the ground. Standing water may breed a host of insects.