According to http://uiflood.blogspot.com/
(the University's temporary site for flood information), the Boyd Law Building is not on the list of flooded or in danger of flooding buildings. It is, however, closed at this time with classes cancelled at least through June 22nd. The LSAT that was scheduled for today was also cancelled.
I'm not a U of I student, but I live in Iowa. Hopefully the law school will be safe from the record flooding.