Event
- Event ID
- 1235
- Quality
- Description
A large hydrogen vapor cloud was released from the base of a bulk hydrogen storage tank, at a speciality gas company. The cloud found an ignition source producing a large fireball, shook windows in the surrounding area, and resulted in minor injuries to one employee.
- Event Initiating system
- Classification of the physical effects
- Hydrogen Release and Ignition
- Nature of the consequences
- Macro-region
- North America
- Country
- United States
- Date
- Component involved
- CGH2 tank (stationary)
- Failure mode
- rupture & ignition
- Initiating cause
- unknown
- Root causes
- Unknown
- Date entry in HIAD
- 25/12/2025
Facility
- Application
- Chemical industry
- Sub-application
- industrial gases production
- Hydrogen supply chain stage
- Process temperature range [C]
- ambient temperature (-50°C to +50°C)
- Location type
- Open
- Location
- populated area
- Operational condition
- UNKNOWN
Emergency & Consequences
- Number of fatalities
- 0
- Number of injured persons
- 1
- Post-event summary
One company worker sustained minor injuries and was treated at the scene.
The blast was powerful enough to be felt and heard miles away, shaking buildings and breaking windows in the vicinity.- Emergency action
Firefighters contained a small fire that remained after the explosion and vented gas from remaining damaged and leaking cylinders to avert further danger.
Workers were evacuated.
Nearby roads were temporarily closed, but no neighboring businesses were required to shut down.
In-depth data
- Release temperature [°C]
- 25
- Probable IGNITION SOURCE
- Explosion type
References
- Sources categories
- News
- Reference & weblink
Milwaukee Journal Sentinel
https://eu.jsonline.com/story/communities/waukesha/news/waukesha/2019/1… 2025)News by abc7chicago
https://abc7chicago.com/5751671/
(accessed December 2025)
