You have to pick:

Hawaii is an island doomed to be sunk at the slightest raise in water level. Alaska it is.

Mauna Kea's elevation is 4,200 meters, I don't think Hawaii is in danger of slipping beneath the waves any time soon. :)

I'm going to assume that this is:
a) A contact poison
b) Makes you sick in small doses, deadly in large doses

This would ruin sauna!