
Civil Defense and Epagri/Ciram warn of above-average rainfall and an increase in storms during spring in the state.
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El Niño is a climate phenomenon characterized by warming of the waters of the Pacific Ocean. The 'very strong' intensity classification is reached when temperature anomalies exceed 2°C.
The bodies that monitor the climate in Santa Catarina began to classify the current El Niño as having "very strong" intensity in the state. In a statement released on Tuesday (29), the state Civil Defense and Epagri/Ciram reinforced the warning for spring, which is expected to record above-average rainfall.
The classification was adopted after international data released this week showed a warming of 2.2 °C on the sea surface in the reference region for monitoring the phenomenon. The index exceeded the 2°C limit used to define an event of very strong intensity.
Santa Catarina Civil Defense meteorologist Nicolle Reis explained that current data supports the change of category:
"For this category, sea surface temperature anomalies need to reach or exceed the level of 2°C. In the last week, this value reached 2.2°C", he details.
According to the Civil Defense of Santa Catarina, although the condition has already been observed in recent months, including reports of hail in different regions, the new classification of the phenomenon gains even more relevance with the advance of spring, which began on September 22nd. The season continues until December 21st.
In addition to the gradual increase in temperatures as summer approaches, the period is naturally marked by more rain and storms with windstorms, lightning and hail in the state. With El Niño very strong, this pattern should intensify between October and December.
Historically, El Niño favors increased rainfall in southern Brazil.
Associated with the characteristics of the season, this phenomenon tends to increase the frequency and volumes of precipitation in Santa Catarina in the coming months.
"The combination of a very strong El Niño, high volumes of rain and greater frequency of storms increases the probability of impacts associated with windstorms and hail, in addition to events caused by excess rain, such as flooding, flash floods, floods and landslides", says the Civil Defense in a note.

Belo Horizonte reached 36.6 °C this Tuesday (29), the highest temperature of 2026, according to Inmet. The record surpasses the previous mark of 35.6 °C from Sunday (27). A strong heatwave warning is in effect until Thursday (1st), with a forecast of up to 37 °C on Wednesday (30th).

With the ground soaked by the rain, the Civil Defense of Santos intensified inspections in risk areas, carried out more than 10 inspections this week and expanded the alert system with Cell Broadcast. The Civil Defense Preventive Plan will begin on November 1st, brought forward due to the predicted impacts of El Niño.

The National Institute of Meteorology (Inmet) issued a red heat wave alert for 81 cities in eastern Minas Gerais. The warning, which indicates a great danger to health with temperatures 5°C above average, remains in force until Wednesday night (30).

Heavy rain this morning flooded streets and knocked down trees in Panambi, with a pine tree falling on a house. Despite the scare, no one was injured. The storms, which began over the weekend, left four people injured and more than 6,000 people displaced, according to Civil Defense. In Santiago, hail damaged 3,000 homes. Residents seek shelter in gyms and support centers, while Civil Defense distributes tarpaulins and renews stocks. In Lajeado, families near the Taquari River are preparing for a possible overflow.

The National Institute of Meteorology (Inmet) issued a warning for intense rains of between 20 and 30 mm/h or up to 50 mm/day, with winds of 40 to 60 km/h, in the municipalities of Lower Amazonas, such as Alenquer and Almeirim, this Tuesday (29). Despite the forecast, meteorologist Lucas Schwarcz from Ufopa states that the showers will be quick and isolated, not marking the end of the dry period, which is expected to continue due to the influence of El Niño. Dry vegetation maintains a high risk of wildfires and impairs air quality, while river levels are expected to continue to fall. Rain is seen as a punctual change, not as the end of the drought.

Intense rain hit Manaus this Monday (28), causing the roofing of houses in some neighborhoods and flooding of streets. Videos on social media show tiles ripped off by the wind. The Civil Defense of Amazonas issued a storm warning with the risk of flooding and flash floods, valid from 12:05 pm to 4:00 pm.