Re: Lithium + water?
Not absolutely correct. As with many fires, the cause of the fire, and not just its fuel must be addressed to safely extinguish the flames. Choosing incorrectly can lead to much larger problems.
In the event of a lithium battery fire caused by thermal runaway in the cells, water is the first choice suppressant. It is the best suited to draining away the heat. Other suppressants may temporarily extinguish the flames through oxygen deprivation, but unless the heat component from the runaway is solved first the fire will resume in very, very short order. After the thermal runaway and initial flames have been suppressed with water other chemical suppressants may be safely used.
This case appears to be just a good old fashioned electrical fire so water was not the correct choice. However, the Dreamliner situation and in other known industrial accidents caused by lithium thermal runaway water is the best initial choice. This is even more critical in an aircraft or vessel in which escape is not safe and the fire must stay suppressed.
The biggest real risk with using water in a thermal runaway fire is that of hot metal slag being ejected from the water pressure and the busy chemical reaction taking place. This would obviously suck, but if it is happening in a place you can't escape from it is an acceptable risk.
As larger lithium batteries enter the consumer product stream safety and awareness will increase. In this case a well educated fire team would have had to make a judgement call as to the actual source if the fire. Even if this was done the water must be applied directly to the batteries to inhibit the runaway. Possibly this is what they were trying but misjudged the cause of the fire?
The upshot of this event is good. It provides for greater education opportunities for fire safety professionals. No one was hurt and now everyone can be better prepared.