Brazilian authorities are urging the public to drink water that has been purified after a toxic algae bloom spread in the Amazon.
The algae bloom, which has now spread into other countries including Peru, has killed at least 11 people and killed one woman in Brazil, authorities said on Wednesday.
The death toll from the toxic algae blooms has risen to at least 13 and is expected to rise further as the problem spreads.
The algae bloom began to appear in Brazil’s Atlantic Ocean near the coast in the state of Goiás on Tuesday and has since spread to other countries.
The state of Sao Paulo, which borders Brazil, reported the first deaths from the bloom on Wednesday, with seven people reported to have died.
The governor of the state, Rodrigo Cunha, said the algae bloom was now spread from Sao Paulo to Brazil’s Pacific Ocean.
Brazil’s government said it had taken the algae threat “very seriously”.
The Brazilian government has warned that it would “not tolerate the spread of this poisonous algae”, and is urging people to avoid drinking water that contains more than 4.5 milligrams of chlorine per litre of water.
The Brazilian government says it will also begin taking measures to improve water quality.
On Wednesday, Brazilian President Michel Temer said he would take the matter up with the World Health Organization, the European Union and the United Nations.
“This is a matter that I will take up with WHO and the UN,” Temer told reporters in Brasilia.
“We have already ordered the WHO and other organizations to help us understand this situation.”