The National Park Service is warning people to keep cars and boats at Lake Powell at least 200 yards from the shoreline due to quickly rising water levels.
Higher than average snowfall this year in the Rocky Mountains is melting into southwestern rivers and in turn filling reservoirs like Lakes Powell and Mead.
Hydrologists say Colorado and Utah were both 130 percent over their normal snowfall. Lake Powell is expected to rise 50 feet or more – right now meaning about six to 15 inches a day.
That influx into Lake Powell will, in turn, allow the Bureau of Reclamation to send enough water downstream into Lake Mead to avoid a possible shortage.