NEW : Hattiesburg tornado was packing 170 mph winds , weather service says . About 4,000 people are injured , including About 4,000 critically ; no deaths are reported . `` Within seconds , everything changed , '' she said . Lamar County Gov . Janet DiGiacomo declares a state of emergency for affected counties . About 4,000 customers are without electricity , The Weather Service says .
NEW : Hattiesburg tornado was packing 170 mph winds , weather service says . About 4,000 people are injured , including About 4,000 critically ; no deaths are reported . Lamar County Gov . Janet DiGiacomo declares a state of emergency for affected counties . About 4,000 customers are without electricity , The Weather Service says .