Demand for power is growing fast, but hydro plants, the oldest source of clean energy, are struggling because of droughts, floods and other extreme weather linked to climate change.

The Bonneville Dam on the Columbia River east of Portland. Washington and Oregon produce more than one-third of the nation’s hydropower. Amelia Templeton / OPB Hydropower generated for electricity ...

Anna Lueck / OPB Persistent drought in the West over the last two decades has limited the amount of electricity that hydropower dams can generate, costing the industry and the region billions of ...

Norwegian hydropower sector is under pressure to prove its green credentials as regulators, researchers and campaigners ...

Hydropower generated for electricity from Oregon and Washington dams fell to historically low levels last year, and experts expect it could drop further by year’s end. Officials at the U.S. Energy ...