| Prob. Risk |
Area (sq. mi.) |
Area Pop. |
Some Larger Population Centers in Risk Area |
| 15 % |
170,047 |
8,007,806 |
Omaha, NE...Wichita, KS...Lincoln, NE...Des Moines, IA...Sioux Falls, SD... |
| 5 % |
437,361 |
36,715,604 |
Chicago, IL...Indianapolis, IN...Milwaukee, WI...Oklahoma City, OK...Kansas City, KS... |
|