Dream from a dozen years ago

Date: 10/28/2018

This is a dream from many years ago. But it's stuck with me cuz it felt very real like this could be something that might happen in the future. I live about 20 miles below Mount Baldy, California. There was snow on the mountains. I felt some rumbling and I looked torward Mount Baldy and I saw a Rocks coming down and shaking and then next thing I know there's a wave of water sloshing over the top of the hill. I remember trying to gather my family. Luckily the water just sloshed over the Mountain and did not continue like a Tidal wave or something.