What should cities and states do to prepare for a major storm?

More than a million people in Florida and Georgia have been ordered to evacuate ahead of the Hurricane Irma. But some people insist they can ride it out. Forecasters expect Irma will remain a massive Category 4 hurricane when it does make landfall, bringing with it 150 mph winds. Irma has already killed 11 people and destroyed massive swaths of entire islands in Caribbean.