True, but there are at least some ways around this, since tiles are up in this phase (figure out a blue 'emergency tile') and worst case the water is actually not deadly at all (if you just swim in it, it only ticks for 40-60, it only hurts if you keep jumping in it).
Encasement though is just... plop - you're screwed.
Sure you can jump like an idiot all the time and hope for the best...
Absorption is no solution either, gets drained to quickly with all the stuff going on.