A nor’easter is expected to bring strong winds, heavy rain and mild to moderate flooding to Long Island, forecasters say.

Here’s what you need to know:

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  • The worst of the storm is expected from about 7 p.m. to 1 a.m.
  • Long Island may see 30 to 40 mph winds, with gusts up to 60 mph. A high wind warning is in effect until 1 a.m. Tuesday.
  • Light, spotty rain started to fall by midafternoon. Steadier precipitation will start by 4 or 5 p.m. and become moderate to heavy at times.
  • Two to 3 inches of rain is expected to fall, but up to 4 inches could fall in isolated spots.
  • Expect difficult driving conditions, especially for those in “high-profile vehicles” such as vans and trucks, as well as those driving on bridges and elevated roadways.
  • Gov. Andrew M. Cuomo warned residents of Long Island and New York City to avoid unnecessary travel.
  • There’s a hurricane force wind warning in effect from 1 p.m. to 1 a.m. Tuesday for the waters off the South Shore.
  • A coastal flood warning has been issued for Monday from 7 to 11 p.m., telling of widespread minor to moderate flooding, with some localized major flooding, along South Shore bays. Low-lying areas along the western Long Island Sound are looking at moderate coastal flooding, the warning said.
  • There’s a flood watch for Nassau County from 1 p.m. Monday to 6 a.m. Tuesday, telling of moderate flooding of streets and low-lying areas, which is possible if the higher amounts of rainfall is met.
  • By 10:30 a.m., coastal flooding had already started along the Peconic waterfront in Riverhead, according to local police.
  • PSEG Long Island has been working to restore power to customers already affected by active outage events on Monday, and said it was prepared to respond to outages as the storm continues. A spokesperson blamed the outages on heavy winds.
  • The utility advised residents to treat any downed wire as a live electric wire and to report it immediately by phone at 800-490-0075. Do not drive over a downed wire and stay away from it and anything it has contacted, the utility said in a news release. If a wire falls on or near your car, stay inside the car and call 911. If you must get out, jump away from the vehicle as far as possible, keeping both feet together, and avoiding contact with the vehicle and the ground at the same time. Then hop or shuffle away, the release said.
  • You can report a power outage by text message. To sign up, text REG to PSEGLI (773454).
  • The Nassau County SPCA advised pet owners to bring their pets indoors and stock up on pet food and pet medication. The organization also warned that dogs can “lose their scent” during storms and easily become lost, so they should be kept on leashes.

Sources: National Weather Service, News 12 Long Island meteorologists