Question: Will I be electrocuted if I touch a hybrid vehicle in a crash?
Answer: Other than if an external power source such as a down power line, no and this is no different than safety provided for a conventional vehicle rescue. The hybrid high voltage system is isolated from the body chassis.
Question: Will I be electrocuted if I touch a hybrid vehicle submersed in water?
Answer: No, while there maybe some leakage, it will not be detectable simply by touching the body or frame of the vehicle.
Question: Is it necessary to call for a HAZMAT response if the high voltage battery pack is ruptured during a crash?
Answer: No, there is not enough electrolyte in the individual modules or in the entire battery pack. Leakage will be very minimal if at all, and usually will be contained with in the modules even if the casing was breached during a catastrophic crash. The electrolyte is considered a gel, having the consistency of a machine oil and is absorbed within a fiber material between the metal plates. Spills can be cleaned up with a suitable absorbent for a strong base, diluted with water and neutralized with vinegar.
Question: At a resent Toyota hybrid crash we saw a clear fluid leak and grayish vapor coming from the trunk, was this from the high voltage NiMH battery pack?
Answer: No, there are 12V conventional automotive batteries, in a severe rear end or offset crash the 12V battery maybe subject to impact. The reaction you saw is similar to that of a conventional vehicle when the 12V automotive battery is ruptured during a crash.
Question: Is there a chance that the high voltage system will electrify the vehicle's body chassis?
Answer: No, like the GIF in your bathroom, the hybrid system also has a ground fault protection should a high voltage cable come in contact with the vehicle's body or chassis.
What Can I do?
Start educating yourself to hybrid technology, now is the time not at 0300 in the morning. Fuel cell vehicles are knocking at the door and will be available to the consumer within the next decade.