1941 Porto Alegre floods
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In May 1941, the waters surrounding the city of Porto Alegre, Brazil, reached a level of 4.76 meters (16 feet; 190 inches) in height and later flooded the Porto Alegre Public Market, Rua da Praia, and the city center.[1] The flood destroyed a large part of the Riacho Railway, which connected the center with the neighborhoods in the southern city.[2] It led to the canalization of Arroio Dilúvio, which had been started in 1939, by the city government and the federal government.[3]
The flood was caused by inner-city rainfall and southern winds.[4]
From April to May 1941, part of Guaíba was in intense rainy weather for 22 days. The water from Guaíba drains into the lake, and the flood was later followed by heavy rains and winds. At the time, precipitation totalled 791 millimetres (2.6 ft; 31 in). The recurrence time for this flood is around 370 years.[5]
