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Balloons blow in the wind at an entrance to the Zillah High School track and football field where four students were injured earlier Wednesday, May 1, 2019. The students were in a bouncy house when it was picked up and flipped by the wind.

A bouncy house at a Zillah High School event Wednesday afternoon was carried more than 240 feet by a gust of wind, injuring five students, one critically.

Emergency responders received a report about an incident on the Zillah football field at 2:35 p.m., said city fire chief Paul Stonemetz.

A “strong whirlwind” picked up and flipped a bouncy house on the football field with five students inside, lifting it 10-20 feet into the air and carrying it at least 240 feet. Stonemetz said it was unknown whether the bouncy house had been anchored to the ground.

One student received CPR and shock treatment before being airlifted to Astria Regional Medical Center in Yakima in critical condition.

Injuries to the other four students included a possible concussion and minor injuries to the knee, ankle and rib, he said. They were sent to Virginia Mason Memorial hospital for treatment.

The names and ages of the victims could not be released as they were minors, he said.

Emergency responders included three Washington State Patrol units, four Zillah Police Department units, two ambulances, 12 firefighters and a helicopter, he said.

Zillah School District officials were dealing with the incident and said they would provide information later.

The National Weather Service does not have a wind meter in Zillah, according to assistant forecaster Anne Adams in Pendleton, Ore. But she said a local monitor showed wind gusts were just below 16 mph at 2:35 p.m.

Reach Janelle Retka at jretka@yakimaherald.com or on Twitter: @janelleretka