Fire activity has surged across Brazil's Amazon rainforest. The Associated Press reported on October 15 that fire counts in the biome roughly tripled after the first round of Brazil's presidential election on October 4. The environment minister said indications point to a deliberate effort to start fires, and federal and state agencies are investigating, though the cause of individual fires still requires evidence. At the same time, El Niño-linked drought has lowered forest moisture and satellites have observed dense smoke around Manaus and Santarém. Pollution in Manaus has closed schools, cancelled public events and affected a city of more than two million people. The political investigation does not replace the climate evidence, and climate conditions do not identify who lit each fire; action must combine enforcement, burn controls, health alerts and long-term forest protection.