The Biggest Problem of Families Living in Slums in Winter is Flooding The biggest problem of the slum dwellers is the floods caused by excessive rains in winter. Since the slums are single-storey or at most two or three storeys, when it rains in winter, the ground floors of these houses are flooded by excessive rainfall. Especially when floods are at night, they cause the death of many people. Authorities want families living in the slums to renovate and repair their homes against flooding in winter.