Snow? Nothing shocking about waking up and seeing 20cm fresh wet snow waiting for you in the winter. But flat roofs are common on commercial buildings and they know to build them strong enough that collapse is very, very rare. Even those buildings, which look like they might fall under their own weight, have survived at least one winter so far.

I suppose you hear the rain, but, then, get a good thunderstorm going and the thunder will distract you from the rain noise. Until the hail starts, anyway.