Train Mathematics?

If one train leaves Chicago at 11:33 a.m. going 29 mph, and another train leaves Detroit at 12:01 p.m. going 33.4 mph, both trains bound for San Francisco, then a Martian spaceship destroys both trains with an anti-hydrogen laser, how many blondes named "Susan" from Walnut Creek, California will be left, and how high will her heels be? You have 12 minutes to complete this equation.