A female cyclist miraculously survived being sucked underwater while trying to cross a flooded Arizona bridge — and the woman who jumped in to save her was nearly swept away herself.

The Pima County Sheriff’s Office responded to a water rescue at Sabino Canyon Thursday after the 20-year-old woman attempted to ride her bike across a bridge as raging floodwaters surged through the area.

The rushing water swept the woman and her bike underneath the bridge, according to authorities.

Terrifying eyewitness video shows the woman struggling to escape after becoming trapped in a hole before she is suddenly sucked beneath the churning water, KOLD reported.

A woman who rushed in to help was also caught in the powerful current and swept downstream, turning the rescue attempt into another emergency.

Good Samaritans eventually managed to pull the victims from the water.

The 20-year-old woman was reportedly unresponsive after being rescued and required CPR before she survived the ordeal.

Others in the group quickly rushed in to try to save her as the good samaritan rescuers frantically worked together to try and pull her out.

However, one of them ended up being swallowed up by the rising waters and dragged downstream herself some 100 feet before she was eventually rescued.

The video shows one minute she’s next to the group and the next moment the woman was completely under water only to come up on the other side of the bridge in the water chest deep trying to get out.

“She takes a step back from the rescue efforts as others are trying to say, and she goes underwater and disappears,” Pima County Sheriff Chris Nanos said.

“And the video pans out to the right downstream, and that tunnel that she disappeared into literally just threw her out another 100 feet down.”

“That’s how powerful that force is,” Nanos added.

The first woman was under water for several minutes before she was eventually pulled out of the water and CPR was started until she regained consciousness, the office said in a post.

“Deputies arrived and assisted the subject out of the drainage.”

Two people were taken to a local hospital and were reported to be in stable condition, the post added.

The sheriff said this situation could’ve been a lot worse.

“What if that tunnel had been clogged? What if she bangs her head? It’s just, you can ‘what if this to death,’ but the real issue is simply don’t do it,” Nanos said.

“PCSD reminds our community: Never attempt to cross flooded washes, whether on a bike, in a vehicle, or on foot,” a post from the department read.

“Fast‑moving water is extremely dangerous and puts you and first responders at risk.”

The canyon is northeast of Tucson where they have been dealing with monsoon storms.