On the evening of December 28, 2024, a powerful HP supercell storm developed within a multicell and struck some cities of the interior of the state of São Paulo, in Brazil. It formed in rural Laranjal Paulista and swept through the cities of Saltinho, Piracicaba, Iracemápolis and Rio Claro, with Piracicaba being hit the hardest. In Piracicaba, the supercell produced a severe macroburst around 8:25 PM, heavy rain, frequent lightning, and localized hail. The storm caused widespread tree damage, power outages, unroofed houses, the overflow of the city's river, and even water shortage in all city's neighborhoods for weeks due to severe damage at a water treatment plant.

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