Drought Killed 66 Million Trees in California

The number of trees in California's Sierra Nevada forests killed by drought, a bark beetle epidemic and warmer temperatures has dramatically increased since last year, raising fears they will fuel catastrophic wildfires and endanger people's lives, officials said. Since 2010, an estimated 66 million trees have died in a six-county region of the central and southern Sierra hardest hit by the epidemic, the U.S. Forest Service said. Officials flying over the region captured images of dead patches that have turned a rust-colored red. The mortality from Tuolumne to Kern counties has increased by 65 percent since the last count announced in October, which found 40 million dead trees.California is in the fifth year of a historic drought, which officials say has deprived trees of water, making them more vulnerable to attack from beetles. Gov. Jerry Brown in October declared an emergency, forming a task force charged with finding ways to remove the trees that threaten motorists and mountain communities. These efforts have hit obstacles, slowing the tree removal as California enters a potentially explosive wildfire season.