Evacuations are not a benign process. Twenty-four people were killed when a bus carrying 38 Houston nursing home residents and six employees caught fire in a traffic jam. It's thought that oxygen tanks used by elderly evacuees had a role in the fire. Given the hurricane predictions for Houston and Galveston, one can't blame officials for ordering evacuations, but the lesson to be learned is evacuations can be costly. In addition to injuries and loss of life, when evacuations are ordered, there are costs associated with opportunistic criminal behavior such as looting, which there were reports of in Houston.