water rich tree trunks dont burn nearly as well as cars

And the reason is that the water boils at a relatively low temperature thus it dissipates the heat until it's dry.

Lahaina is usually dry, they get about an inch of rain per month, unlike the rainforest a bit North/East (they filmed parts of Jurassic Park there) where there is rain pretty much daily, quite often raining more than once per day.

Lahaina feels more like a desert town than the rainforest of Io Valley which occupies most of that part of the Island.

Look at where it happened, come on man. Have you seen the pics?

Yep, no prob, except for the trees that are burning from the inside out again ?...

not to mention the incredibly flammable interior. the cushioning in the seats, when burning, can get hot enough to melt steel.