Chevrolet 2011 Volt Collision Awareness Manual page 45

Handling
Fire
If battery cells reach high enough temperature, they vent and release electrolyte. Battery electrolyte is flammable.
Use copious amounts of water to cool the battery and extinguish the fire. ABC dry chemical extinguisher will not
extinguish a battery fire.
Water
The high voltage battery is sealed and isolated from the vehicle chassis. If the vehicle is immersed in water, you
will not be electrocuted by touching the vehicle.
Locate and review the Lithium-Ion Battery Chemistry Material Safety Data Sheet for more information.
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