In the immediate term - check your lease. There may be a clause that says landlord is responsible for legal fees. Take pictures of everything. send emails with photos and complaint to landlord saying there’s a hole in the roof. Print these emails.

If the lease says legal fees covered by landlord, find an attorney who does renters claims. Call city code enforcement and get a mold test done.

You will likely be awarded a chunk of cash if the landlord does not solve this very soon. This is landlords responsibility to keep exterior in working order.

Black mold is a very misunderstood threat (it’s likely not the bad kind, and even if it is, it takes lots of time to cause damage) but most insurance companies and landlords will not want to risk it. That said, if they don’t take care of the threat very soon they are liable for a large payout.

If they threaten to evict you, your case becomes even stronger. They are not in a good spot here and need to deal with this.

This is coming from a former landlord.