September 20, 2018 5:40 pm First Responders Tell Merrimack Valley Explosion Story A week after gas explosions rocked the Merrimack Valley, some of the many first responders who were in the middle of the chaos are recounting their experiences. US & World Videos 1:52 Several people injured after house party incident in Northborough 1:45 Celtics win Game 3 in Cleveland to retake series lead 0:35 Man who received pig kidney transplant has died 1:30 Water search underway after boat washes up in Beverly 1:20 ‘Sidney's Rainbow Day' event honors 5-year-old killed in Andover crash