Gov. Charlie Baker has signed an emergency declaration allowing him to request help from neighboring states as Massachusetts struggles to dig out from a spate of heavy snows.

Baker signed the declaration Monday as a third storm dumped upward of two feet of snow in portions of the state.

Baker also declared a partial snow day on Tuesday applying to non-emergency state workers in the hardest hit areas of Massachusetts, including Suffolk, Norfolk, Essex and Middlesex counties.

The emergency declaration allows Massachusetts to request equipment like dump trucks and front-end loaders from nearby states. It also lets Massachusetts more quickly sign snow removal contracts with private companies.

Baker said many local parking bans could continue for much of the week.

He said he's also keeping an eye on a possible storm Thursday night.

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The MBTA is suspending all rail service while it tries to clean up from an unprecedented barrage of snow.

The Boston-area transit system announced Monday that all subways, trolleys and commuter rail will stop running at 7 p.m. on Monday and will remain shut down all day on Tuesday.

There will be limited bus service during that time.

T officials said crews will spend the day trying to clear snow and ice from tracks and assess damage that has been done to equipment during the recent spate of storms.

Gov. Baker says he's frustrated and disappointed with the performance of the MBTA during the recent spate of severe winter weather and plans to sit down with transit officials after the latest storm to discuss service disruptions

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With today's accumulation added in, the National Weather Service in Boston says this winter has had the 10th most snow on record.

As of Monday afternoon, Boston's Logan Airport had received just under 20 inches of snow from this winter storm. That's boosting the overall snow accumulation this winter to about 74 inches.