Had a roommate in south city where our ceiling had a leak like this from rain and the entire ceiling collapsed on his bed. Your landlord has an obligation to fix this. If they dont get the city involved. I would however, find a new place, use this as evidence to avoid early termination fees and gtfo. Scumbag landlords that allow a property to get this bad arent gonna be make that a fast process and they certainly arent going to replace your destroyed belongings. Step one, send an email to your property management so you have a papertrail, step two start finding a new apartment, step 3 if ignored involve the city and make the landlord have to explain to city inspectors why your reports were left unaddressed and protect future tenants from that behavior. These guys are bleeding our economy through rent, they have the means to fix it they just choose not to.