From Buffalo News:
"Damage in Mayville was extensive. The roof of Chautauqua Liquors and an attached business was torn off. Trees were down on several streets, and power and cable lines were down.
On Morris Street,... Homes on Valley Street also were damaged extensively. Traffic was routed away from Route 394, the main street in Mayville. Several side streets were clogged with limbs and downed power lines."
WIVB (channel 4 from Buffalo)