If greenhouse gas emissions continue at their present rate, ice shelves could collapse by the end of the century.
For the first time, there are signs of foliage die-back on sequoia seedlings, a rare and worrying prospect.
"Once again, we must confront a powerful blow from nature."
With 700,000 acres burned so far this year, there's no end in sight for the inferno; or firefighters and victims, the numbers represent an uphill battle.
Ten years after Katrina the racial disparities in New Orleans, in the richest country in the world, have actually widened.
When Katrina hit, the nation saw tens of thousands left behind in New Orleans. Ten years later, it looks like the same people have been left behind again.
The move is especially bewildering for many, as the president has declared Alaska to be "the frontlines of our fight against climate change."
Environmentalists and rank-and-file railroad workers took to the streets protesting continued transportation of oil trains.
Held by 350.org and the Sierra Club, the event marked the two-year anniversary of the disaster, the Lac-Megantic, Quebec, oil train explosion that killed 47 people.
They plan to note that oil-laden trains are so dangerous that transporting oil across the continent by train should be severely curtailed, if not ended.