We had the heating pipes replaced this winter (just our apartment), we were without hot water for a week (they took down the boiler), then the building water tank broke, so we were even without water at the same time (took 4 days to fix, it was a simple level meter pipe that slipped away, but nobody noticed...).
They tore down the walls of all our apartment, there was so much dust that I couldn't sleep in my own bad because I kept coughing.
After the repairing was done, they had to close the walls, paint everything back, re-install the boiler, fix the electric fixture they had removed. We kept cleaning the house to make it livable, went to shower at a family member's daily, washed teeth with bottled water. All in all 40 days of work, of which one week in unlivable conditions.
We did the cleaning works ourselves because it was clear that nobody took that into account and anyway it would have meant to wait another week for a professional cleaning. Had to wash/clean everything because the fine dust settled even in taped cabinets. New mattress is now striped with dust on the bottom.
When we told the landlord that it sounded unfair to pay rent for such a place, that we wouldn't have rented it in the first place if we had know it would have been in that state for a month. He sounded offended, like we were playing a trick on him. (Plus we were without heating for the 3 months before the works).
Other landlords/owners in our building have refused to make any work to avoid the discomfort. In our case it was not a matter of safety, just of heating not working due to bad pipes. The other people living in our building use electric heaters, but our landlord had a 10-years guarantee on the house, so the jobs were covered by insurance and he'd rather go that way than pay for electric heaters for us.
I don't expect Argentinian landlord to care about their tenants anymore.