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The Pinheiros River is green in Sao Paulo, Brazil, Tuesday, Sept. 10, 2024. The state's environmental authority attributes the river's new green hue to an algae bloom, the result of a severe drought that has significantly lowered water levels. (AP Photo/Andre Penner)

The Pinheiros River is green in Sao Paulo, Brazil, Tuesday, Sept. 10, 2024. The state's environmental authority attributes the river's new green hue to an algae bloom, the result of a severe drought that has significantly lowered water levels. (AP Photo/Andre Penner)

The Pinheiros River is green in Sao Paulo, Brazil, Tuesday, Sept. 10, 2024. The state's environmental authority attributes the river's new green hue to an algae bloom, the result of severe drought that has significantly lowered water levels. (AP Photo/Andre Penner)

The Pinheiros River is green in Sao Paulo, Brazil, Tuesday, Sept. 10, 2024. The state's environmental authority attributes the river's new green hue to an algae bloom, the result of severe drought that has significantly lowered water levels. (AP Photo/Andre Penner)

The Pinheiros River is green in Sao Paulo, Brazil, Tuesday, Sept. 10, 2024. The state's environmental authority attributes the river's new green hue to an algae bloom, the result of severe drought that has significantly lowered water levels. (AP Photo/Andre Penner)

The Pinheiros River is green in Sao Paulo, Brazil, Tuesday, Sept. 10, 2024. The state's environmental authority attributes the river's new green hue to an algae bloom, the result of severe drought that has significantly lowered water levels. (AP Photo/Andre Penner)