During its recent history, Houston has flooded several times from heavy rainfall, which has been becoming increasingly common.[43] This has been exacerbated by a lack of zoning laws, which allowed unregulated building of residential homes and other structures in flood-prone areas.[44] During the floods in 2015 and 2016, each of which dropped at least a foot of rain,[45] parts of the city were covered in several inches of water.[46] Even worse flooding happened in late August 2017, when Hurricane Harvey stalled over southeastern Texas, much like Tropical Storm Allison did sixteen years earlier, causing severe flooding in the Houston area, with some areas receiving over 50 inches (1,300 mm) of rain.[47] The rainfall exceeded 50 inches in several areas locally, breaking the national record for rainfall. The damage for the Houston area is estimated at up to $125 billion U.S. dollars,[48] and it is considered to be one of the worst natural disasters in the history of the United States,[49] with the death toll exceeding 70 people. On January 31, 2018, the Houston City Council agreed to forgive large water bills thousands of households faced in the aftermath of Hurricane Harvey, as Houston Public Works found 6,362 homeowners' water utility bills had at least doubled.[50][51]

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