São Paulo records wettest September since 1943, triple monthly average in 14 days

São Paulo city logged 253.8 mm of rain in the first 14 days of September, three times the monthly climatological average, marking the wettest September since records began in 1943. The data is partial and from a single station (Mirante de Santana), so citywide impact remains uncertain. This extreme rainfall raises flood and landslide risks in a densely populated urban area, with potential infrastructure and economic disruption.