California delivered a narrow victory to the solar industry, maintaining a policy that has underpinned solar's growth.
Even though El Niño-fueled storms have brought rain and snow to California, the state remains in intense drought.
While El Niño's ocean temperatures may have peaked, the biggest impacts for the U.S. are likely still to come.
For the first time on record, U.S. wildfires burned more than 10 million acres in a year.
From disappearing ice sheets to rising temperature to megadroughts, these are the top climate science studies.
Eight western states have recorded their warmest year-to-date through October, and the Lower 48 could see a Top 10.
The role of climate change in extreme weather events is examined in an annual compilation of attribution studies.
Climate change is worsening wildfire risks in the West, but pinpointing its effects remains difficult.