I don't know if your area is covered but, in my area, I can get all of the local Fire, Police, Ambulance, State Troopers, Coast Guard, and a few other things online. You could check to see if there is a scanner set up for your area at:
http://www.scanamerica.us/index.php

Interestingly, they just recently added the Washington D.C. police, that should be interesting tomorrow.