I just got through to my boss (didn't think it polite to call early in the morning on a holiday, after all ;)
Both her townhouse (with no basement *gulp*) and her parents' house (they live fairly close by) escaped the tornado with only a few broken windows. Her parents' house was close--within two blocks everything is destroyed. (The curious can see photos of the damage in the area here.)
I am so relieved. I can finally relax now.