10/21/2026
🚒⚡ **EV BATTERY FIRES: IS LETTING THEM BURN ALWAYS THE BEST OPTION?**
One of the tactical considerations discussed in lithium-ion battery fire training is allowing an involved high-voltage battery to burn under controlled conditions when there are no immediate life-safety concerns or threatened exposures.
But what exactly constitutes an exposure?
A September 2026 research study from Germany, *Assessment of Hazardous Substance Exposure During Electric Vehicle Fires*, raises important questions about the hazards associated with EV battery fires.
Researchers conducted two full-scale electric vehicle fire tests and identified several concerning findings:
🔹 **Toxic gases before visible flames:** Hazardous gases, including hydrogen fluoride (HF) and hydrogen cyanide (HCN), were detected during battery venting.
🔹 **Dangerous carbon monoxide concentrations:** Localized CO readings exceeded 2,000 ppm during testing.
🔹 **Airborne particulates:** Researchers identified fine and ultrafine particles, raising additional concerns about inhalation exposure.
🔹 **Post-fire contamination:** Battery-related metals and other hazardous substances were identified on surfaces and in extinguishing media.
**HERE'S THE QUESTION WE SHOULD BE ASKING:**
When we say there are no exposures, are we considering only nearby buildings and vehicles, or are we also considering the people and properties downwind?
Allowing an EV battery to burn under controlled conditions may still be an appropriate tactical decision. However, that decision should account for atmospheric hazards, environmental concerns, firefighter safety, and available suppression options.
It's equally important to recognize that this study did not establish whether allowing a battery to burn produces greater overall community exposure than active suppression.
At Scomac Associates, our Lithium-Ion & EV Incident Operations training emphasizes practical decision-making based on actual incident conditions, not a one-size-fits-all approach.
As additional research becomes available, we believe our training and tactical discussions should continue to evolve.
**Our objective remains the same: Protect lives, stabilize the incident, and minimize unnecessary risks to responders and the communities we serve.**
A special thank you to Level Training Network / Next Level Extrication for bringing this research to the attention of the fire service. Sharing information and encouraging professional discussion helps all of us improve responder safety.
**What are your department's current tactical considerations when dealing with an actively burning EV high-voltage battery?**
📚 Research: *Assessment of Hazardous Substance Exposure During Electric Vehicle Fires* (2026)
https://www.mdpi.com/2571-6255/9/9/401
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