Long Island officials and residents prepared throughout the day for possible flooding caused by the quick-hitting winter storm Sunday evening.

The storm system is expected to bring a wintry mix of snow, heavy rain and powerful winds and threatens to bring coastal flooding to waterfront communities.

Chris Vitale, of Baldwin Harbor, spent Sunday morning getting ready for the coastal storm.

“If the canal is overflowing, then I can't get out," Vitale said. He and other residents stocked up on water and other supplies as well.

"I'm a Long Islander, so I'm used to it. If it's going to be rain, if it's going to be sleet, whatever, I prepare myself, said Baldwin resident Geraldine Dean.

Town of Hempstead crews spent also the past few days preparing by cleaning out storm drains and trimming trees.

"We are expecting some power outages in this area. High tide will be approximate 9:35 a.m. on Monday. So it's a bad combination. As I said, the winds will be coming up and there will be flooding," said Town of Hempstead Supervisor Don Clavin.

Residents in flood-prone neighborhoods, like one in Lindenhurst, take the forecast seriously, especially after Superstorm Sandy devastated the area. They make sure boats are tied securely and cars are moved to higher ground.

Over in Massapequa, Joe Clemente just moved into a waterfront home and said he's battening down the hatches.

"Can't really hold Mother Nature back. Just pray for the best," Clemente said.

Town of Oyster Bay Supervisor Joseph Saladino said they're ready for whatever Mother Nature brings.

"We have designed newer higher bulkheads, we have replaced our storm drains. We sent out crews all this week cleaning out those storm drains, so it makes for the best drainage possible," Saladino said.

Officials advised residents to secure outdoor furniture, move cars to higher ground and have a supply of batteries ready in case of power outages.