Rescuers are searching for a tuber that went missing nearly three days ago in the swollen waters of the Colorado River.

According to the Grand County Sheriff’s Office, a man in his 30s disappeared Sunday afternoon while tubing in the Colorado River near Radium. He was last seen floating through an area of class II-III rapids also known as the “Eye of the Needles.” He has been missing since.

At about 2:00 p.m., dispatchers received a call about a possible boater in distress alerting them of the potentially dangerous situation.

The search was suspended at 7:30 PM Sunday but, resumed again on Monday. The missing tuber has not been found as of 11:30 a.m. on Tuesday. He was reportedly not wearing a personal flotation device while on the water.

The act of tubing generally involves floating down a relaxed waterway on an inner tube. At this time, this is unsafe on many of Colorado’s rivers and streams due to rapid snowmelt and increased water flows. Please check with local authorities regarding which waterways are safe for outdoor recreation at this time.

The Colorado River flows 1,450 miles from Poudre Pass in Rocky Mountain National Park to the Gulf of California in Mexico. Here’s a look at where the river’s headwaters are located on a map.

This is a developing story. More information will be added as it becomes available.

Thanks goes out to the responding agencies including The Grand County Sheriff’s Office, Grand County Search and Rescue, Grand County EMS, Bureau of Land Management, Colorado Parks and Wildlife, Eagle River Fire Protection District, and Vail Mountain Rescue.

Editor’s Note: Heading out on the water this spring? It’s important to be aware of the dangers of fast and icy cold flows on rivers, creeks, and streams. The weather may be warm, but the water is still extremely cold. Hypothermia and drowning are possible. Please use caution, and always wear a personal flotation device in case of unexpected submersion. Many deaths occur every year from drowning and hypothermia. As a safety precaution, you should also tell someone the section of the river you plan to explore.