zombody posted... I could be wrong, but im pretty sure it doesnt let up until you go inside
It definitely stops eventually. But it feels like it takes an hour. Given how time distorts for me when playing video games, I assume it lasts somewhere between 15 minutes and half an hour. I let it pour all it wants, personally, but if you want it to stop then yeah, just enter a building (subways included...I think) and it'll stop.