Day 1 Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
SLIGHT 84,015 6,674,451 St. Louis, MO...Aurora, IL...Joliet, IL...Springfield, IL...Peoria, IL...
MARGINAL 225,420 20,208,194 Chicago, IL...Memphis, TN...Nashville, TN...New Orleans, LA...Baton Rouge, LA...