Officials in Riverhead and other East End communities are bracing for Elsa and the possibility of flooding.

Riverhead Town Supervisor Yvette Aguiar says she is working with PSEG Long Island and Altice to prepare for the storm's arrival, including staging vehicles at Enterprise Park (EPCAL).

"They are going to stage upwards of 150 vehicles so they can respond to the East End immediately," says Aguiar.

PSEG Long Island is set to bring in crews from out of state to help contend with Elsa's wrath.

At Oakland's Restaurant and Marina in Hampton Bays there is plenty of work to be done ahead of Elsa.

"Every boat has about six to eight lines in the marina so we basically put 12 lines on the boat, so if something breaks or comes loose the boat will still be fine," says Christian Oakland, of Oakland's Restaurant.

The worst of Elsa is expected to be felt on the East End. The majority of the heaviest rain will be Thursday into Friday.

Town of Southold Supervisor Scott Russell says, "I think a lot of people will probably be sleeping, or certainly not going about their day yet by the time it moves out, but of course it coincides with high tide, which in coastal communities presents some real coastal flooding challenges."

A local tree worker says he's preparing for a busy 24 hours. He warns homeowners to be on the lookout for trees that could potentially get knocked down.

Officials urge everyone to stay off the roads and made a plea to surfers to stay out of the water.