Piauí Ranks Sixth in Brazil for Land Burned Over 41 Years
Piauí ranks as the sixth Brazilian state with the largest area affected by fires between 1985 and 2025, according to the latest annual fire report from MapBiomas. Over this 41-year period, more than 12.4 million hectares in the state were impacted by flames. Piauí trails behind Mato Grosso, Pará, Maranhão, Tocantins, and Bahia in terms of total burned area. Nationally, 208.4 million hectares, representing 24% of Brazil's territory, have been burned at least once in the last 41 years, with the Amazon and Cerrado biomes accounting for approximately 86% of this total. The report highlights that the El Niño phenomenon exacerbates fire risks in Northern and Northeastern Brazil due to hotter and drier conditions. Native vegetation suffered 71.5% of the fires, compared to 28.5% in areas of human use like pastures and farmlands. A significant finding is the recurrence of fires, with 64% of all burned areas in Brazil experiencing multiple fires between 1985 and 2025. Among these repeatedly burned areas, 52% were re-ignited within a four-year interval. Researchers caution that shorter intervals between fires hinder forest recovery and increase vulnerability to future blazes.
This report quantifies the extensive land area impacted by fires in Brazil over four decades, with Piauí being significantly affected. The data reveals a concerning pattern of recurring fires, particularly in native vegetation, which compromises ecosystem resilience and recovery. The influence of climatic phenomena like El Niño underscores the interplay between environmental conditions and fire incidence, suggesting that climate change may intensify these risks. The concentration of burned areas in the Amazon and Cerrado, coupled with the recurrence of fires, points to systemic challenges in land management and fire prevention strategies that require robust, long-term solutions. Understanding the drivers of these recurring fires, including land use practices and environmental factors, is crucial for developing effective mitigation and adaptation policies to protect Brazil's vital biomes.
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