As Zika spreads northward, scientists are beginning to understand how humans stoked the epidemic.
This year's wildfire season in California shows signs of influence from climate change.
Weather-related disasters made worse by climate change could make world peace more elusive.
Conditions behind California's drought and warm coastal waters were mostly natural, but not entirely.
The Fort McMurray wildfire was the costliest natural disaster in Canadian history, ringing up $3.58 billion in losses.
California’s Central Valley has three times more freshwater in underground aquifers than previously thought.
California's overworked firefighters are being forced to take on another task — clearing dead trees.
Global warming and the whims of the weather mean California remains in drought despite the El Niño.