This photo taken on Sept. 9, 2023 shows buildings destroyed by flood at the city of Mucum, Rio Grande do Sul, Brazil. Photo: Xinhua

People walk by buildings destroyed by flood at the city of Mucum, Rio Grande do Sul, Brazil, on Sept. 9, 2023. Photo: Xinhua

People clean up a building at the city of Mucum, Rio Grande do Sul, Brazil, on Sept. 9, 2023. Photo: Xinhua

A man removes building debris on a street at the city of Mucum, Rio Grande do Sul, Brazil, on Sept. 9, 2023. Photo: Xinhua

People mourn during the burial of a victim at the municipal cemetery at the city of Mucum, Rio Grande do Sul, Brazil, on Sept. 9, 2023. Photo: Xinhua

Rescue workers clear mud and debris in a school at the city of Mucum, Rio Grande do Sul, Brazil, on Sept. 9, 2023. Photo: Xinhua

People remove house debris at the city of Mucum, Rio Grande do Sul, Brazil, on Sept. 9, 2023. Photo: Xinhua

This photo taken on Sept. 9, 2023 shows buildings destroyed by flood at the city of Mucum, Rio Grande do Sul, Brazil. Photo: Xinhua

People attend a rally to commemorate the victims at the Municipal gymnasium in Vespasiano Correa, Rio Grande do Sul, Brazil, on Sept. 9, 2023. Photo: Xinhua

People clean up a school at the city of Mucum, Rio Grande do Sul, Brazil, on Sept. 9, 2023. Photo: Xinhua

People clean up a school at the city of Mucum, Rio Grande do Sul, Brazil, on Sept. 9, 2023. Photo: Xinhua