It sounds like firefighters from Chelmsford, and maybe Hudson or Nashua as well, are converging on the Merrimack River because a powerboat containing six people lost power.

The boat is north of the bridge in Tyngsboro and floating down with six people on board, the youngest of whom is 16, according to radio broadcasts.

It sounds like everyone is fine, but without any power, they're going to need a hand getting to shore as of 5:50 p.m.

UPDATE: Radio broadcasts indicate the boat has a dead battery and is getting a tow back to a boat ramp in Lowell. All is well.