Apagão no Brasil: o que causou a falta de luz que deixou o Rio às escuras

outubro 14, 2025

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Um apagão ocorrido na madrugada desta terça-feira (14) interrompeu o fornecimento de energia elétrica em diferentes regiões do país, afetando ao menos nove estados e o Distrito Federal, segundo o Ministério de Minas e Energia (MME). A causa da falha foi um incêndio em um reator da Subestação de Bateias, no Paraná, que provocou o desligamento de cerca de 10.000 megawatts (MW) do sistema nacional às 00h32.

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De acordo com o MME, a recomposição das cargas foi iniciada de forma controlada logo após o incidente. Às 1h30, o fornecimento de energia já havia sido restabelecido nas regiões Norte, Nordeste, Sudeste e Centro-Oeste. No Sul, a normalização completa ocorreu por volta das 2h30.

No estado do Rio de Janeiro, a concessionária Light informou que aproximadamente 450 mil clientes foram afetados pela interrupção. Segundo a empresa, a falha foi resultado de uma atuação automática do Esquema Regional de Alívio de Carga (ERAC) — um sistema de segurança que entra em operação para evitar sobrecargas no Sistema Interligado Nacional (SIN).

As áreas mais atingidas foram a Zona Norte, Zona Oeste e a Baixada Fluminense, onde o fornecimento de energia foi restabelecido em cerca de 30 minutos.

Durante o apagão, relatos de moradores e vídeos publicados nas redes sociais mostraram diferentes pontos da capital às escuras. Um dos registros mais comentados foi o do Aeroporto Santos Dumont, que ficou completamente sem iluminação por alguns minutos.

O Ministério de Minas e Energia informou que acompanha as investigações sobre as causas do incêndio na subestação e que o Operador Nacional do Sistema Elétrico (ONS) deve apresentar um relatório técnico detalhado sobre o ocorrido.


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