Cuba has thousands of these Soviet style apartment buildings. Almost all are in disrepair and require major work. The government is the landlord, and it won't foot the bill for repairs. So the occupants are living in 40-50 year old buildings that are more than showing their age. The cisterns on the roof hold the buildings water supply. The water is "delivered" to buildings every other day, and the cisterns provide the water for the "off" days.