The most serious ill effects - high winds (potentially bearing debris) and the waves - are nullified, so you're mostly talking about currents. And I don't think a puchi sub needs to worry too much about either drowning or running aground.
Ohh...Or rather, that's... a typhoon, right?It... rained, didn't it...Know what, Kiso?That in this world until now, there's been snowfall but not rain.Heey, Tenryuu - did you know?