A Colorado backcountry skier freed himself after an avalanche and tried to save his son. After a two hour search, his son was found dead.

• A father and son got caught in a slide while skiing in Colorado.

• The boy was found dead two hours after his father called for help.

• Climate change is increasing the risk of deadly slides.

The father was not able to help his son after he was swept up in the snow.

At 1 p.m., packed snow cascaded down the side of the mountain, partially burying the father and burying the son, according to a report released Sunday.

The father tried to find his son, but couldn't. His son was found dead by a rescue dog after he tried to call for help.

The fathers and sons were identified by the Denver Post.

According to the information center, the son was one of two people who died this season.

There are more "rain-on-snow" events in Colorado during the winter because of the changing climate, according to the director of the Colorado Avalanche Information Center.

For a specific period of time each year, there used to be a certain number of avalanches, but they are now happening throughout the season, according to CBS.

Business Insider has an article on it.