NEW YORK - Mayor Bill de Blasio and city officials from the Office of Emergency Management held a press conference Friday, warning New Yorkers to brace for the potential of Tropical Storm Hermine.

All of New York City was placed under a tropical storm watch just moments before the mayor addressed the public.

The mayor warned all New Yorkers to be prepared as the storm is expected to make its way toward the coastline. He added that everyone should be prepared and that all city beaches would be closed to swimming on Sunday.

Boat experts say people should double up their dock lines, make sure their batteries are charged so water will be pumped out properly and to check back at the marina as the storm progresses. Some boat owners are taking down sails, moving their boats and taking them out of the water completely.

Hermine barreled through Florida early Friday, leaving at least one man dead and creating a path of destruction, which included coastal flooding, heavy rain and high winds.

News 12 meteorologists say there is potential for more than 2 inches of rain and 4 to 6 inches in some coastal areas.