States along the East Coast were pummeled by post-tropical storm Sandy on Monday as it came crashing ashore.

The storm officially made landfall along the coast of southern New Jersey, but it is affecting a much wider area.

By Monday night, more than 2.8 million customers were without power across 11 states and the District of Columbia, according to the latest CNN estimate. At least 11 people have died.

Here's a look at how coastal states are dealing with the storm:

CONNECTICUT

One person was killed and two sustained injuries that weren't life-threatening after a large tree fell on them in Mansfield, according to a statement from Connecticut State Police.

Gov. Dan Malloy said authorities are worried about high tides, particularly the one at midnight Monday, which could be up to 11 feet above the normal high tide and "has the potential to cause unprecedented damage."

"The potential loss of life and loss of property in Connecticut, if these numbers are hit, will be extremely high," he said. "This is the most catastrophic event that we have faced and been able to plan for in any of our lifetimes. And we continue to do anything in our power to be ready."

Because of dangerous driving conditions, all state highways were closed to nonemergency vehicles starting at 1 p.m. Monday, the governor said in a statement.

President Barack Obama has declared a state of emergency for Connecticut.

DELAWARE

Parts of the Delaware coast experienced significant flooding.

By early Monday, the National Guard and local authorities were responding to residents who did not evacuate and "need to be rescued from flooding," Gov. Jack Markell said in a Twitter post.

Markell ordered the evacuation of all coastal communities and a flood-prone area in southern Delaware.

Shelters opened beginning Sunday afternoon to accommodate those who have left their homes but have nowhere else to go. Statewide, 500 people spent the night in five shelters, Markell said Monday.

"The biggest concerns, the rain and the wind together make driving conditions absolutely miserable, so we put in a driving restriction today," he said.

The restrictions mean only "essential personnel," such as core government employees and those who provide health care services, should be driving.

Obama declared a state of emergency in the state Monday, the White House said.

DISTRICT OF COLUMBIA

The city's mass transit system, known as the Metro, stayed idle Monday.

All Washington public schools were closed Monday, Mayor Vincent Gray announced. The district readied for the storm's effects, which could include heavy rain, street flooding, strong winds, power outages and storm-surge flooding along the Potomac River and its tributaries, Gray said.

All federal buildings were closed to the public Monday and will be Tuesday as well.

President Barack Obama declared a state of emergency in the District of Columbia on Sunday.

MAINE

The Maine Emergency Management Agency warned Sandy could create "significant problems" such as high surf, fierce winds and coastal erosion.

Flooding is also possible in areas where rain is heaviest, emergency officials said.

In anticipation of widespread power outages, Gov. Paul LePage signed a "limited emergency declaration" so power crews from other states and Canada can help the state prepare for Sandy. The declaration also extends the hours that power company crews can drive.

MARYLAND

Gov. Martin O'Malley said officials in Maryland prepared for the worst.

"This is going to be a long night," he said late Monday. "We're only now just kind of beginning the rough part of this storm. These next 12 hours will likely be the most intense."

Public schools in Baltimore, Montgomery and Prince George's County were closed Monday. Baltimore Mayor Stephanie Rawlings-Blake announced mandatory travel restrictions for city roadways, starting at 6 p.m. Monday.

In the coastal city of Annapolis, city crews distributed sandbags to residents and businesses to help them prepare for flooding.

Obama declared a state of emergency in Maryland on Sunday.

MASSACHUSETTS

Gov. Deval Patrick declared a state of emergency for the Bay State.

Hoping to avoid the kind of criticism utilities received after last year's Hurricane Irene and other storms, Patrick said utilities plan to pair tree removal and power restoration crews, rather than having them work separately, so that work can be done more efficiently.

Boston announced that schools were closed Monday, and all public transportation services in the city were suspended. Schools were scheduled to be open Tuesday.

Obama also declared a state of emergency for Massachusetts.

"All in all, we're holding our own," Patrick told reporters Monday afternoon. "I think it's going well, but it's nature, and it can change in a minute."

NEW HAMPSHIRE