You can at least put out a gasoline fire through conventional means, and gasoline has a much lower higher flash point than you'd expect. Lithium fires, on the other hand, hoo boy... It's the difference between a moist firecracker and a brick of C4.

Edit: Typo/fact check. Gasoline has a fairly high flash point, which means it needs a higher temperature [than you would expect] before it will self-ignite.