It would take more than a 60 or 70 MPH gust of wind to take a broadcast tower down. The bigger concern would be ice; while nobody here lost a tower in the Great Ice Storm of 1991, the 1998 ice storm took out a TV tower across the lake in Kingston, Ontario, as well as AM towers in Quebec.
Several of the local FM stations have auxiliary antenna locations that would allow them to get back on the air at low power if they were to lose their main towers; there are no ready-to-go aux sites for the AMs, but with AM you can always throw up a longwire antenna and get some semblance of a signal back on the air in case of emergency.