The city of Anamã, located in the interior of Amazonas state, has 70% of its territory submerged due to the swelling of the Solimões River, with approximately 1,700 families affected, the Municipal Civil Defense reported on Tuesday (27).
Anamã is among the 28 municipalities currently under a state of emergency due to widespread flooding across the state.
Historically, the flood season in the region begins in the second half of October, following the dry period — which in 2024 recorded historic low water levels across the state.
According to the Permanent Committee for Climate and Environmental Events Response, all nine river basins in Amazonas are expected to remain flooded through at least June.
In Benjamin Constant, a municipality located in the far western region of the state, water levels of the Javari River — a tributary of the Solimões — have risen above normal.
In rural areas, farmers have lost nearly all of their crops.
Monitoring data from the upper Solimões region, where Benjamin Constant is located, shows that water levels have started to stabilize.
Meteorologist and researcher Leonardo Vergasta attributes the increased river volumes to the combination of the “Amazonian Winter” and the La Niña phenomenon.
“At the beginning of 2025, La Niña began to affect the region, cooling the waters of the equatorial Pacific,” explained Vergasta.
“This leads to intensified rainfall in the Amazon. Because it coincided with the rainy season, the entire basin has recorded above-average rainfall since February.”

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