One person was killed and two others were injured in three separate incidents at Yosemite National Park this week.
The death happened at Bridalveil Fall on Wednesday.
Reports say 21-year-old Lucian Miu of Romania hiked to the viewing platform below Bridalveil Fall, and then scrambled up the boulder field toward the base of the waterfall.
Witnesses say Miu slipped off the wet boulders and fell about 20-feet.
Rescue crews reached him and airlifted to El Capital Meadow, where he was taken by ambulance to a hospital, but was later pronounced dead.
Another visitor fell off the boulders on Monday.
The last incident happened on Thursday at Lower Yosemite Fall.
A person slipped off a boulder, and fell into Yosemite Creek, and for a time, was trapped underwater between rocks.
However, this person was able to break free, and bystanders helped the victim out of the water.
Yosemite Park administrators declined to name the three people who were injured, or release their gender.
But local news outlets reported Miu's death.
Park rangers are warning visitors that falling water have smoothed the surfaces of the granite boulders, making them slippery and dangerous, whether they are dry or wet.