A new study shows that marine heat waves have become more frequent and more severe as ocean temperatures have climbed.
Meanwhile, several blazes in Northern California have yet to be contained.
A man and a boy wash and cool off their dog with the water of an opened fire hydrant.
In 2015, every state in the country was warmer than the 20th-century average.
As hotter summers become more deadly, warmer winters won't bring respite, according to new research.