Overview

The Amazon wildfires refer to a recent surge in fires in the Amazon rainforest, particularly in the Brazilian states of Amazonas and Pará. Brazilian authorities are investigating whether some fires were deliberately set for political motives ahead of the second round of the presidential election. Fire counts across the biome, which had been near historic lows earlier in the year, reportedly tripled after the first round of voting on Oct. 4.

Investigation

Environment Minister João Paulo Capobianco said officials observed fires in protected forest areas arranged in a distinct geometric pattern, which suggested possible deliberate setting. He described the indications as a premeditated effort, while noting that it was not clear who may have started the fires or what their motivations were. Officials and researchers also pointed to other possible causes, including unauthorized burning, retaliation for enforcement actions, and malicious intent.

Political impact

The fires disrupted daily life in Manaus, the capital of Amazonas, where smoke led to canceled public school classes and calls for residents to wear face masks. Amazonas and Pará were particularly affected. The event became a point of political contention during an election campaign in which forest protection and climate change had received limited attention. A monitoring analysis by Barometro, developed by FALA, found that conservative politicians in Amazonas were among the most vocal about the fires and smoke.

Environmental and health effects

The Amazon rainforest is the world’s largest tropical rainforest and stores large amounts of carbon. Smoke from the fires worsened air quality in Manaus and other affected areas, prompting emergency measures. The Amazonas government said it had declared a state of emergency in municipalities affected by the wildfires and had met with federal officials to discuss firefighting support.

Causes and risk factors

Wildfires are unplanned and uncontrolled fires in combustible vegetation. In the Amazon, fire ignitions are commonly linked to human activity, especially clearing land or renewing pastures, and such burning can escape during dry periods. Climate change and deforestation can make the forest hotter, drier, and more flammable, while El Niño can worsen heat and drought. Researchers noted that fire counts were expected to rise with El Niño conditions, but the sharp increase around the election period remained notable.