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A tourist who was visiting Hawaii was killed after being swept away from her sister’s side during a flash flood while kayaking with a tour group.

Nine people including seven visitors and a guide were suddenly thrown in to the water during a powerful surge of water on Wailua River.

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Everyone was rescued except Aimee Abrahim, 32, of El Cajon, California.

Her younger sister, Crystal, survived but Aimee’s body was found on Sunday morning.

She was a sales representative at Janssen Pharmaceuticals in La Jolla, her LinkedIn profile says.

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The group was with Kayak Wailua tour group company.

Owner Peter Fisher said the victim and her sister were swept away as they crossed Uluwehi Falls with a rope about 5pm.

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He said: “This is a situation where it was really freakish because we didn’t have any rain.

“There was no rain on the kayak.

“There was no rain during the hike.”

The company’s Facebook page read: “An extremely rare flash flood occurred in the blink of an eye from slow moving shallow water to deep raging water. “All kayak companies were operating earlier in the day.

“The flash flood warning was issued long after the tour commenced.”

This story first appeared in The Sun.