Tom Jeffery : It seems like natural disasters are hitting with no reprieve . Media coverage has made us more aware , and scientific methods of detection and analysis are much better than 50 years ago . Jeffery : I think the biggest one is climate change, but there have been a lot of other things that seem to be getting worse as well. if '' but `` when '' From 2000 to 2011 , he says , almost 9,000 tornadoes hit states outside Tornado Alley . Jeffery : As U.S. population grows every year , so does the cost of severe weather .
Tom Jeffery : It seems like natural disasters are hitting with no reprieve . Jeffery : I think the biggest one is climate change, but there have been a lot of other things that seem to be getting worse as well. if '' but `` when '' From 2000 to 2011 , he says , almost 9,000 tornadoes hit states outside Tornado Alley . Jeffery : As U.S. population grows every year , so does the cost of severe weather .