Day 1 Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
SLIGHT 335,278 14,480,679 Fort Worth, TX...Oklahoma City, OK...Arlington, TX...Wichita, KS...Lubbock, TX...
MARGINAL 640,479 44,169,905 San Antonio, TX...Dallas, TX...Austin, TX...Boston, MA...Kansas City, MO...