As the climate warms, many U.S. lakes are seeing more algal blooms, low oxygen levels and stressed out fish species. One team in Oregon hopes that pumping oxygen into the water can help.
More than 50 people are dead in the aftermath of Typhoon Hagibis, which dropped extreme amounts of rain over the weekend and caused catastrophic flooding in residential areas.
Firefighters are battling several wildfires in California, including the Saddleridge fire in Los Angeles County, which has burned more than 7,500 acres.
Philadelphia is trying to convince residents to drink tap water. But national studies show low-income and minority groups are less likely to trust public water.
The typhoon, which has now passed to the northeast of Tokyo, was the largest to hit Japan in 61 years, since the 1958 Kanogawa Typhoon that killed more than 1,200 people.
Wildfires in Southern California have burned over 47,000 acres and forced tens of thousands to evacuate. High winds and dry conditions are causing the fires to spread quickly.
Wildfires in Southern California have burned dozens of homes overnight and are forcing mandatory evacuations. They're being fueled by dry conditions and fanned by 70 mph winds.
The intentional blackout in northern California is now in its third day. The longer it lasts, the harder it is for residents, businesses, and governments to cope.