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A prolonged drought, now in its second year, is devastating large swaths of Brazil's Amazon rainforest. Whole communities and the Amazon's largest city are struggling under the parched conditions.

The historic city of St. Augustine, Fla., is battling rising seas to protect its heritage and tourism dollars. But it's also making a digital record of its artifacts in case they are lost.

Drought is pushing Arizona farmers to the brink as they've been cut off from the shrinking Colorado River. The crisis is also renewing questions about the viability of growing crops in a desert.

Drought is pushing Arizona farmers to the brink as they've been cut off from the shrinking Colorado River. The crisis is also renewing questions about the viability of growing crops in a desert.

Florida's Indian River lagoon is a rich estuary, home to dolphins, manatees and turtles. But in recent months, it has become clear that something is wrong. Scientists and government officials blame water discharges from Lake Okeechobee and an upswing in pollution.

The World Health Organization says an Ebola outbreak in Democratic Republic of the Congo has reached a new, more worrying phase after a case turned up in a port city on the Congo River.

A vast swath of the Midwest has been under siege from torrential rains while also being hit with a heat wave. Hundreds of people were rescued, homes were damaged, and at least two people have died.

Privatized U.K. water utilities have failed to upgrade Victorian plumbing, and 75% of U.K. rivers now contain unsafe levels of raw sewage. A group of athlete-activists are lobbying for change.

For Alaska Native communities along the Yukon River, fishing for salmon has always been a central part of life. But climate change is driving a massive collapse in salmon populations.

Another eight people remain unaccounted for. Several cars and trucks plunged into the Tocantins River after a section of the 1,748-foot-long bridge crumbled on Sunday.