A tornado of moderate strength (EF-01, the second lowest classification) blew through Concord this morning, the National Weather Service confirmed Monday. The tornado was 400 yards wide and a half mile long, and traveled at around 100 miles per hour.

Concord Fire Chief Mark R. Cotreau told the Globe that there were no injuries or deaths.

"We have 39 houses damaged in some way, but miraculously, just one house with significant structural damage," said Cotreau.

There is significant tree damage around Concord, which means a big clean-up effort is underway today.

Crews work to cleanup debris from #tornado this morning pic.twitter.com/5kut9NZkoQ— Town of Concord (@Concord_MA) August 22, 2016

Just an example of many massive trees down here in Concord after tornado came through #wbz pic.twitter.com/dtA1xqt6GD— Paul Burton (@PaulWBZ) August 22, 2016

By Dina Rudick/Globe Staff -- A worker cleans up downed trees in Concord, after early morning storm moved through the area. The National Weather Service confirmed a EF­1 tornado did touch down. #concordma #concord #weather #tornado #storm A photo posted by The Boston Globe (@bostonglobe) on Aug 22, 2016 at 9:04am PDT

Tangled mess of limbs and lines in historic Concord this morning. Caused by powerful winds and rain that blew through this morning. A photo posted by Jason Bacon (@jbacon0601) on Aug 22, 2016 at 7:13am PDT

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