Falling trees caused extensive damage across the river towns Friday, including in South Nyack, where thousands of customers lost power and authorities reported blocked roadways.

South Nyack Mayor Bonnie Christian says downed trees and power lines have led to blackouts and blocked streets.

"It was quite worse than we expected," Christian said.

Despite the damage, no one in the community was hurt, according to Police Chief Dan Wilson. Authorities announced a state of emergency there out of caution.

The powerful nor'easter -- a so-called bomb cyclone -- also led to traffic problems on the Gov. Mario Cuomo Bridge, where authorities banned large vehicles for the day after strong winds knocked over a tractor-trailer.

In Putnam Valley, authorities say the winds knocked over a tree that fell on and killed a boy.