Heavy rains that began last week have caused rivers to flood, inundating whole towns and destroying roads and bridges across the southern Brazilian state of Rio Grande do Sul. The local civil defence agency said the death toll had risen to 90, while 131 people were unaccounted for with 155,000 homeless. A state of emergency has been declared in 397 of Rio Grande do Sul’s 497 towns and cities as rescue efforts continue. The Taquari River in Rio Grande do Sul. Photographs: Maxar Technologies/AFP/Getty Images Flooded areas around Grêmio Arena in Porto Alegre. Photographs: Maxar Technologies/AP Copernicus Sentinel-2 satellite images showing a broad area along Jacuí River, in Rio Grande Do Sul. Photographs: Maxar Technologies/AFP/Getty Images