Drought turning Golden State's redwoods brown
For the first time, there are signs of foliage die-back on sequoia seedlings, a rare and worrying prospect.
Powerful quake hits Chile, tsunami floods coast
"Once again, we must confront a powerful blow from nature."
California landscape scorched as wildfires blaze on
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.
On Katrina and lessons from Cuba
Ten years after Katrina the racial disparities in New Orleans, in the richest country in the world, have actually widened.
