I guess most places where rain is commonplace are designed so rain would not disrupt daily life (like in the event of a flooding, for example). I've experience schools closing due to heavy rain over the years (one memorable one was, of all days, 9/11). Where I live could be considered a desert (not in the US btw), so while we have our rainy seasons we are not used to heavy, constant rains: the city is not built for it, so in the rare chance it happens, storm drains can't handle it, traffic turns to chaos, and it's just too cumbersome/dangerous to go outside. With climate change, I'm thinking this will be an issue many places will have to face sooner or later.