It has been 2 days since 19-year-old Aleh Kalman was missing. The waterfall in Yosemite National Park might have killed its first victim in 2013, park officials claim Monday.

The 19-year-old swimmer was with a church group when the event happened. Reportedly, he was swimming 150-feet upstream of the Nevada Fall, but found that the current was too strong for him.

On his way to swim back from a rock in the center, he was rushed down the stream and over the fall. 594-foot fall is "not survivable", according to a comment by park spokeswoman Kari Cobb.

"We have moved to limited, continuous searching." Cobb comments that the river is "swift and powerful" around this season in the year, and water temperatures are in the low 50s.

Though swimming is not forbidden in the park, visitors are told to be extremely cautious due to the high speed that the rivers run and also its extreme temperatures.

The river was running about 500 cubic feet per second last Saturday when the Sacramento resident was struggling to come to shore. The speed increased to 650 cubic feet per second on Sunday.

In 2012, Jacob and Andy Adams fell into the Merced River rapids and drowned. They were 6 and 10 years old.