I discovered and issue while I was solo slooping in the Devil's Roar.
When the volcano on Ashen Reaches started to erupt, I was anchored and started to bucket out water. When I tried to access my plank and banana barrels, it would not allow me to while I was under distress from the hot water.
I know that having hot water in your boat while near an island erupting is very intentional, however, I'm not sure if this was noticed or overlooked. This particular event caused me to sink with over 100 of each resource aboard my ship.
I think that while inside a ship, if at all possible, you should still continue to take damage from burning water, but it would be nice to be able to access barrels in order to be able to recover from the event of a volcano attack.