Natural disasters happen. And when they do, they turn our lives upside down, leaving behind panic, anxiety, and stress. Research published in Psychological Medicine suggests that as many as 30 to 40 percent of disaster victims develop post-traumatic stress disorder (PTSD), along with 10 to 20 percent of rescue workers and 5 to 10 percent of the general public. Although you can’t control many aspects of a natural disaster, there are steps you can take to minimize your stress. Here are nine.