Don't tell the government, at least not yet. If they assess the situation as dangerous and condemn it, you will not be allowed to go back inside for anything so you will lose all your belongings. Maybe the landlord will be nice and care enough to fix it, maybe not. If it worried me I'd just move ASAP then inform the government afterward. You can't really force the issue without risking some kind of loss yourself, and since you don't own the house there's no point in risking any loss when you don't have to. CYOA first, then protect others from potential harm.

Phil