Merrimack Valley September 14, 2018 7:15 am Thousands Forced to Evacuate After Mass. Explosions Thousands of people who were forced to evacuate their homes following a series of explosions and fires in the Merrimack Valley are wondering when they can return to their homes. US & World Videos 3:41 Cool air to linger over Boston into the weekend 2:28 Karen Read trial continues, jurors visit crime scene 2:44 Karen Read trial Day 4: Jurors to visit crime scene 1:30 Bruins lose Game 6 in Toronto 4:28 State Department apologizes to family of man imprisoned last year in Turks and Caicos