The snow melt in the high Sierras means the Merced River running through the Yosemite Valley is running high, posing a hazard to potential visitors this weekend.

The water flowing through the Merced River nears temperatures of about 46 degrees, even on a sunny day. In the past 10 years there have been 22 drownings in the river, and there are more than 200 search and rescue operations in the park every year with 12 to 15 are in or around water.

"Its cold melted snow and we are getting the word out to visitors to keep your distance from the water," said National Park Ranger Scott Gedimen.

Rangers and rescuers are advising visitors to stay away from the water for at least the next few weeks.