What to Know A powerful nor'easter slammed New England overnight, knocking out power for more than 200,000 customers and downing trees across the region.

The MBTA was experiencing "severe delays" due to power outages, flooding and downed trees.

Dozens of schools across New England had closed, including in Connecticut, Massachusetts, Vermont and Maine.

A record-breaking autumn storm plunged hundreds of thousands of people into the dark, toppled trees, canceled schools and delayed trains in the Northeast, while persistent winds Thursday hampered efforts to clean up and restore power and clean up.

At one point Thursday, 500,000 customers in New England were left without power due to downed trees and power lines, including five entire towns in Massachusetts, according to The Boston Globe. Those numbers were shrinking by Thursday evening.

Heavy wind and rain passed through New England overnight, causing significant damage along the Massachusetts coast.

In Scituate, Massachusetts, a tree on Booth Hill Road not only blocked the street, but brought down utility lines, as well. At one point, about 90% of residents were without power. And with strong wind gusts continuing all day Thursday, it was difficult for repair crews to get much work done.

"I, myself, would like a hot shower," resident Sally Spear said. "We're just dealing with it."

Much of New England was hammered by a heavy storm overnight.

Dr. Ruth Lamprey of Brigham and Women's Harbor Medical Associates had no power at her office. She met with some of her patients in the parking lot.

"One patient, I saw in the car," she said.

The Massachusetts Emergency Management Agency reported that more than 223,000 customers in Massachusetts were without power on Thursday during the height of the damage. As of 11:15 p.m., that number had dipped below 96,000.

There were still more than 119,000 customers without power in Maine at that time. More than 13,500 customers remained in the dark in Rhode Island. Nearly 7,000 customers were without power in New Hampshire, with under 2,700 outages remaining in Vermont.

Police in Methuen responded Thursday morning after a tree fell and crashed through a house on Hidden Road. No injuries were reported.

tree into a house at 22 Hidden Rd. No injuries reported. via @ChiefSolomon pic.twitter.com/2PCIchqFOV — Methuen Police 🇺🇸 (@MethuenPolice) October 17, 2019

Rebecca Casserly of Everett said she woke up at 1:30 a.m. to the sound of a large tree coming down on her property.

"I flew out of my bed and saw complete darkness... I opened my door and saw nothing but greenery," she said.

Due to the power outages and road closures, some schools in New England announced closures or delays. To take a look at the full list, click here.

Public transportation was also affected by the storm, according to the Massachusetts Bay Transportation Authority. The MBTA warned its customers to expect "severe delays" due to power outages, flooding, downed trees and wire issues.

IMAGES: Nor'easter Causes Damage in New England

The Steamship Authority said trips on multiple routes had been canceled including those to Nantucket and Martha's Vineyard. Click here for more ferry information.

Some gusts during the storm reached up to 90 mph at the coast, with multiple areas getting bashed by the harsh winds. Boston got up to 70 mph wind, Worcester up to 38 mph and some towns in Connecticut experienced gusts of up to 50 mph.

Winds were expected to return midday Thursday and although they won’t thrash the region as much as they did overnight, they pose a threat because the 45 mph gusts that may return can topple weakened trees and power lines. Even if power is restored, customers may still get outages because power lines may be affected in the second round of winds.

Fallen trees and branches won't be the only hazard on the road Thursday; slick, wet leaves could stick under cars and cause them to lose traction. It’s advised to take it slow on back roads that are covered with wet leaves.

In New Hampshire, about 100 school districts reported closings and delays Thursday morning due to a lack of electricity or downed trees and power lines. About 50,000 customers lost power. A wind gust of 128 mph was reported on Mount Washington, the Northeast's highest peak, according to the National Weather Service.

Nearly 20 school districts closed schools in Connecticut, where about 40,000 customers were without power.

About 34,000 customers were without power in Rhode Island and about 10,000 customers were without power in Vermont.

In Maine, nearly 200,000 people lost power. Heavy rain combined with 60 mph wind gusts knocked down trees and power lines, advising residents to look for hazards on Thursday because many roads were unsafe, the National Weather Service said.

In Portland, the atmospheric pressure at sea level — an indicator of the strength of a storm — was the lowest ever recorded in October, said William Watson, a meteorologist with the National Weather Service.

Nine boats were tossed ashore in Rockland, Maine, and a pier suffered some damage, said Sarah Flink, executive director of Cruise Maine.

The nor'easter formed off New Jersey, strengthening as it traveled north. New York authorities said a wind-driven fire destroyed three houses in the Fire Island hamlet of Ocean Bay Park early Thursday. No injuries were reported.

Kim Buttrick, a meteorologist with the National Weather Service in Massachusetts, said the storm system met the definition of "bombogenesis."

Storm intensity is measured by central pressure — the lower the pressure, the stronger it is. A storm is considered a "bomb" when the pressure drops rapidly.

"That's why we ended up with strong, sustained winds and wind gusts," Buttrick said. "It's an indicator of an extremely powerful storm and not something to ignore."

Most areas saw rainfall totals of 1 to 3 inches, though some areas of southern New England got about 4 inches.

No injuries were immediately reported as a result of the storm.

To take a look at the active weather watches, warnings and advisories, click here.