Nashua, New Hampshire – A powerful natural gas explosion tore through a mental health facility in Nashua on Monday afternoon, injuring three firefighters and destroying the building. Investigators are now examining whether falling ice damaged a gas line before crews arrived, potentially triggering the blast.
Emergency responders were initially called to reports of a gas odor and hissing sound at the Greater Nashua Mental Health Center on Amherst Street. Moments later, the situation escalated into a multi-alarm fire that shook nearby buildings and forced widespread road closures.
Incident Overview
The explosion occurred at Greater Nashua Mental Health, located at 440 Amherst Street, shortly after 2:30 p.m. Monday. Fire crews responding to a reported gas smell were already on scene when the blast happened, sending flames through the structure and injuring firefighters working inside.
Three firefighters suffered non life-threatening injuries and were transported to area hospitals. One was released later that evening, while the remaining two were kept overnight for observation.
Despite the intensity of the explosion and fire, all employees and patients inside the facility were safely evacuated.
Timeline of Events
Fire officials said the initial call came in for a gas odor and audible hissing sound, prompting an immediate response.
As firefighters assessed the situation, additional resources were requested due to the potential danger.
“When they arrived on scene, they quickly called for more resources. A Mayday was transmitted once the explosion took place,” said Nashua Fire Chief Steve Buxton.
The explosion occurred shortly after crews entered the area, forcing an emergency withdrawal and triggering a large-scale firefighting operation.
Details From Fire and State Officials
Following the blast, flames rapidly consumed the structure, leading officials to declare a four-alarm fire, a level that mobilizes nearly all available fire resources in the city.
“This was a four-alarm fire which is pretty significant for the city. That brings all of our resources to the scene,” Buxton explained.
Firefighters faced extreme challenges as they battled the blaze, including bitterly cold temperatures and frozen infrastructure. According to the chief, at least one hydrant line appeared frozen, complicating water access.
“They had to overcome a couple of dead hydrants to establish a water supply. We needed a large amount of water to put the fire out,” Buxton said.
Hoses were stretched more than half a mile down Amherst Street to secure enough water to suppress the flames.
Witness Accounts From Nearby Residents
Residents and workers in the area described feeling the explosion from inside nearby buildings, comparing it to a major collision or structural impact.
“The whole building shook. I thought a whole car hit the other side of the building. It was pretty bad,” said Lacey Aponte, who was nearby at the time.
Another witness, Amely Collado, said she was trapped in traffic for hours as emergency crews worked.
“Literally it was like the whole building was on fire. I have never seen something catch on fire before, but that was like insane,” she said.
Key Facts Confirmed So Far
• Three firefighters injured, all with non life-threatening injuries
• Explosion occurred around 2:30 p.m. Monday
• Location: 440 Amherst Street, Nashua, NH
• Incident escalated to a four-alarm fire
• Building completely destroyed
• All 40 employees evacuated safely
• Patients accounted for with no reported injuries
According to coverage, investigators are examining whether falling ice may have damaged the gas line before the explosion occurred.
Investigation and Safety Concerns
The New Hampshire State Fire Marshal’s Office is leading the investigation into the cause of the explosion. Officials have not yet confirmed whether ice damage is responsible but say winter conditions are a significant factor under review.
Emergency alerts were sent to residents in the surrounding area, warning them to avoid open flames or burners. Those alerts were lifted once officials determined the incident was isolated and no longer posed a broader threat.
Public Safety Reminder
Fire officials emphasized the importance of acting quickly when gas odors are detected.
“I think the biggest thing, our safety message is if you smell gas call 911 and get out,” said State Fire Marshal Sean Toomey.
Gas leaks can escalate rapidly, especially during winter months when frozen ground, ice buildup, and temperature fluctuations increase stress on underground utility lines.
Conclusion
While the cause of the Nashua explosion remains under investigation, officials credit quick action by firefighters and staff for preventing loss of life. The incident highlights the dangers first responders face and the added risks posed by harsh winter conditions.
Residents are urged to remain vigilant and report gas odors immediately to prevent similar emergencies.
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