Water is feared to be contaminated after a bridge collapsed in northern Brazil over the weekend, sending thousands of liters of pesticides and lorries carrying sulfuric acid into the river below.
Four people are dead and more than 10 are missing after a bridge linking the states of Tocantins and Maranhao collapsed in central Spain on Sunday afternoon.
It is not clear how much chemical has leaked from their containers, but diving operations in the river have been suspended while the situation is assessed.
Dramatic video filmed by a local councilor who went to draw attention to the crack in the bridge showed the start of the collapse.
Councilor Elias Jr said that while he was there and was “in shock”, he never expected the bridge to collapse.
Eight vehicles, including three lorries with chemicals, fell into the river.
People in the towns of Estreto and Aguirrenopolis on both sides of the river have been told to avoid collecting water from it.
Rescue operations are underway by boats. Four bodies have been recovered, including that of a female truck driver and an 11-year-old girl, the fire service said. A person was rescued alive from the water on Sunday.
The Juscelino Kubitschek de Oliveira Bridge – more than half a kilometer (1,600ft) long – was built in the 1960s and is the main link between the two states across the Tocantins River.