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Social-media users in Brazil's São Paulo have been sharing images of a smoke-filled sky across the city.

São Paulo was blackened for around an hour on Monday afternoon after strong winds and a cold front brought in smoke from forest fires burning in the states of the Amazonas and Rondonia, more than 2,700km away.

We spoke to two residents of the city who say that they have been affected by the smoke.

Photo: Darkness descends on Sao Paulo at 16:00 (20:00 GMT) due to smoke from forest fires
Credit: Jeff Nascimento