Porto Alegre, Brazil (AFP) May 20, 2024

With his Brazilian city deep in brown floodwaters for the past three weeks, the mayor of Porto Alegre faces a herculean challenge: rebuild from the disaster while racing against the clock to prevent new ones.

Weeks of torrential rain in the southern state of Rio Grande do Sul have devastated Porto Alegre, its capital, submerging more than 1,000 kilometers (620 miles) of streets in the city o
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