São Paulo is bracing for heavy rains and potential flooding as the region prepares for severe weather on Christmas Day, December 25, 2024. The state and capital are under close scrutiny due to anticipated intense showers expected to take place primarily during the afternoon and nighttime hours. Specifically, municipalities like Campinas, Sorocaba, Bauru, and coastal areas are at risk, according to alerts from local weather authorities.
The Civil Defense department of São Paulo and emergency management teams have issued warnings highlighting the likelihood of severe rain throughout the holiday period. According to the Climate Emergency Management Center (CGE) of the São Paulo City Hall, rainfall intensity is projected to peak later in the day, which could heighten the risk of flooding across metropolitan areas. The CGE notes, "Até 28ºC durante o dia, com uma umidade relativa do ar em torno de 55%, o que eleva o risco de alagamentos," indicating climate conditions conducive to heavy precipitation.
With the formation of the first South Atlantic Convergence Zone (ZCAS) of the summer, which began on December 21, such weather phenomena typically lead to consecutive days of heavy rain, elevational landslides, and urban flooding risks. This year's Christmas poses serious concerns, as residents are advised to be alert for unusual weather changes. The CGE also reiterated the need for vigilance, as prolonged heavy rains can ground activities and severely impact daily life.
Temperatures on December 25 are expected to range from 20°C to as high as 28°C, with sustained humidity levels around 55%—conditions perfect for torrential downpours. The anticipation of the additional rainfall, particularly following earlier occurrences, could significantly increase the chances of flooding and waterlogging.
Emergency services have urged citizens to stay indoors and avoid flood-prone areas. "A Defesa Civil e os órgãos municipais recomendam que os cidadãos evitem áreas propensas a alagamentos e busquem abrigo em locais seguros durante os temporais," said officials, emphasizing the imperative of safety during adverse weather conditions.
Reports of flooding have already begun to surface from various regions, including Bauru, where heavy rain resulted in urban flooding on Christmas Day. Streets were inundated at different points within the city. The Civil Defense confirmed there have been no casualties or property damage reported as of late Wednesday, December 25. Teams have been deployed to monitor water levels and assist with emergency response.
On Wednesday evening, the downpour caused the level of waterways to rise significantly, reportedly flooding streets such as Rua Benevenuto Tiritan near the Jardim Jandira area. Residents were quick to report conditions, noting difficulties posed by high water levels. Flooding was also reported on Rua São Sebastião, showcasing the widespread impact of the storm.
Looking forward, weather forecasts predict consistent rainfall over the coming days, with humidity likely exceeding 90%. The probability of precipitation remains exceptionally high, at 100%, meaning residents should prepare for continued wet conditions even past the holiday festivities.
Temperatures are expected to remain relatively mild during this period, with maximums around 27°C. Winds are expected to maintain moderate speeds, which will accompany the heavy rains. These conditions underline the necessity for residents to have contingency plans to mitigate against potential disasters triggered by the rainy weather.
Officials reiterate the importance of being prepared, particularly for those living in mountainous regions, where the risk of landslides is heightened. Residents are advised to be alert to any signs of land movement, such as cracks forming or muddy water flowing down slopes. Those wishing to receive real-time updates and emergency alerts are encouraged to register their postal codes by texting 40199.
With significant weather patterns aligning, citizens are urged to take heed of recommendations from safety officials. The convergence of climate conditions this Christmas exposes many to higher risks of flooding and landslips, requiring continued awareness and action to stay safe during these unpredictable weather events.
