Sabrina ColeMay 21, 2026 4 min read

3 Dead and 23 First Responders Hospitalized After New Mexico Hazmat Emergency

Workers remove a body in Mountainair, New Mexico on Wednesday, May 20, after several people died and more than a dozen first responders were exposed to an unknown substance. | AP Photo / Savannah Peters
Workers remove a body in Mountainair, New Mexico on Wednesday, May 20, after several people died and more than a dozen first responders were exposed to an unknown substance. | AP Photo / Savannah Peters

Three people are dead and 23 first responders were hospitalized after a hazmat situation at a rural New Mexico home Wednesday that authorities believe involved a potent unidentified substance — likely narcotics.

New Mexico State Police were called to a residence in Mountainair, a small community east of Albuquerque, after four people were found unresponsive inside. Three died. The fourth was transported to a hospital in Albuquerque for treatment. As first responders arrived and began working the scene, they started experiencing symptoms themselves — nausea, dizziness, coughing, and vomiting — and had to be quarantined and decontaminated.

A total of 25 people were ultimately exposed to the unidentified substance: the four people found inside the residence and 21 first responders. Of the 23 patients transported to University of New Mexico Hospital, 18 were discharged after assessment and decontamination. Three responders were admitted for further treatment. Two were listed in serious condition Wednesday evening, according to New Mexico State Police Officer Wilson Silver.

The Substance Remains Unidentified

As of Wednesday evening, investigators had not publicly identified the substance. Albuquerque Fire Rescue Hazmat teams were on scene working to determine what it was. Authorities said they believe it is transmitted through contact rather than through the air — a finding that shaped how subsequent responders approached the scene.

Three of four of the occupants of the residence have since died. | KOB
Three of four of the occupants of the residence have since died. | KOB

"Based on the information currently available, all indications are pointing toward narcotics as a possible factor," Mountainair Mayor Peter Nieto said in a social media post. State police confirmed that narcotics are being considered as a likely cause but have not made a definitive determination. Officials were also clear that carbon monoxide and natural gas were ruled out as causes.

New Mexico State Police said there is no threat to the broader public and no communitywide hazmat concern.

First Responders Caught Off Guard

Mountainair EMS Chief Josh Lewis was the first to enter the residence and was hospitalized overnight for observation. Also among those affected were EMTs from Torrance County and nurses from University of New Mexico Hospital who came into contact with individuals on scene.

Albuquerque Fire Rescue
Albuquerque Fire Rescue

Antonette Alguire, a firefighter with Mountainair's volunteer fire department, helped perform CPR on a woman outside the home and watched as EMTs and firefighters around her began coughing, vomiting, and becoming dizzy near the heliport. Alguire said she never went inside and has not experienced symptoms — but the experience shook her.

"I guess we're just going to have to start wearing hazmat suits into these calls and wearing oxygen," she said. "It's getting to that point where we just have to live in fear, even saving lives."

A Community in Shock

Mountainair is a small, rural town of roughly 900 people in Torrance County. For residents, the scale of Wednesday's response — state police, hazmat teams from Albuquerque, and mass hospital transports — was unlike anything the community had seen.

"It is a scary situation," nearby resident Xavier Romero told local outlet KRQE. "It's just awful. I never thought something like this would happen in Mountainair."

Mayor Nieto gave public works staff and other town employees the day off Thursday in light of the situation and promised the public would receive more information as it becomes available. "We continue to ask for prayers for the victims, our EMTs, and all first responders involved," he said.

The investigation is ongoing. The substance has not been identified as of publication.


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