In recent days, the North, Central-West, and Southeast regions of Brazil have experienced significant rainfall due to the ZCAS phenomenon, which is a moisture corridor extending from the Amazon to the Southeast. This Sunday, the situation is expected to worsen as a cold front arrives at the coast of São Paulo, resulting in overcast weather that will likely persist into Monday. This development is particularly concerning for Carnival attendees who partake in street block parties, as the rain will impede festivities.

According to the Climate Emergency Management Center (CGE) of the São Paulo City Hall, Sunday will feature rain starting in the morning, escalating to isolated showers that will intensify throughout the afternoon and into the evening. This weather conditions raises the potential for flooding, fallen trees, and possible overflow from small streams and rivers in the capital and neighboring municipalities within the metropolitan region, leading to potential hazards for residents.

Moreover, the temperatures during this period are expected to fluctuate, potentially impacting the plans of those celebrating. The forecast could shift the focus of many revelers, prompting them to seek indoor activities or alternative celebrations as safety concerns over adverse weather conditions mount. This situation underscores the impact of climatic events on local festivities and the need for preparedness in response to such changes in weather patterns.