On the afternoon of Monday, October 9, heavy rainfall in São Paulo prompted the city's Emergency Climate Management Center (CGE) to issue flood alerts for the South, Southeast, and West zones, as well as the Pinheiros River area. The warning was initiated at 2:15 PM, as isolated but intense rain areas began affecting various city regions. Meteorological radar images indicated strong rainfall in several local administrative districts, including Santo Amaro, Campo Limpo, Cidade Ademar, Jabaquara, Butantã, and Ipiranga.

The CGE noted that the rainfall was characterized by moderate to strong intensity, with the storms moving quickly through the affected areas. Conditions for thunderstorms persisted, bringing the risks of localized flooding and falling trees throughout Greater São Paulo. As these weather phenomena developed, residents were cautioned about the potential hazards associated with such severe weather, particularly in already vulnerable areas prone to flooding.

With forecasts indicating further weather activity, city officials have been monitoring the situation closely and are advising citizens to remain vigilant and prepared for any sudden changes in weather conditions. This situation highlights the ongoing challenges the urban infrastructure faces in managing heavy rains, especially in densely populated areas prone to flooding, raising concerns about environmental policies and urban planning in the region.