While progress is being made on rebuilding a section of the Big Oak Flat Road in Yosemite National Park, there is no firm date for when the road will reopen to traffic.

One reason the National Park Service has such a hard time reducing its maintenance backlog is the fact that very little stands still in a national park environment. At Yosemite National Park in California, for instance, slippage that damaged a section of the Big Oak Flat Road has kept crews working, and maintenance costs escalating, since late February.

An atmospheric river of moisture took aim on California and the High Sierra over the last few months, dumping snowfall in amounts that haven’t been seen in years. While the state’s multi-year drought isn’t entirely over, the Pineapple Express (as the storms raging in over the Pacific Ocean from Hawaii are referred to) has been hammering California with rain and snow.

On March 29, THIRTEEN's Nature program will explore the impact of climate change on the ecosystem of Yosemite National Park.