Fort Lauderdale, Event Company May Face Legal Action After Bounce House Incident

— -- The city of Fort Lauderdale and a bounce house vendor may face legal action on behalf of children injured in a Memorial Day bounce house incident.

A notice of claim sent Thursday by attorney Brian Greenwald to Fort Lauderdale Mayor John Seiler said a 5-year-old in the bounce house "sustained physical injuries to her left wrist, as well as emotional distress."

"Due to the set up of the bounce house itself, the lack of the requisite level of supervision at the bounce house's location, as well as the inclement weather conditions... the City of Fort Lauderdale acted with gross negligence," the claim says.

"The negligent actions and/or inactions of the City of Fort Lauderdale directly caused [the child's] physical and mental trauma," the claim adds.

Other notice letters, sent Wednesday from the law firm of Cohen and Cohen to the city of Fort Lauderdale and All Star Events, say "due to the negligence in the control, maintenance and/or operation" of the bounce house, an 11-year-old "sustained severe and permanent injuries."

The letters from Cohen and Cohen say the city and company have 30 days to reply.

Mayor Seiler called the incident "a freak act of nature that no one could have prepared for or predicted."

Seiler said in a statement: "The change in weather was sudden and severe. An intense waterspout came ashore rapidly and without warning, bringing forceful winds that meteorologists have estimated were between 65 and 85 miles per hour. Its powerful unpredictable path knocked down street lights and destroyed a cement basketball support structure."

The city said it has already put the bounce house vendor, All Star Events, on notice of their responsibility as "we continue to investigate the incident."

All Star Events said in a statement: "Our thoughts and prayers go out to the families affected by this freak occurrence. We are glad to learn that there were no serious injuries and that the three children affected have already been released from the hospital. We were as surprised as anyone by the events occurring yesterday during Memorial Day festivities on Ft. Lauderdale Beach. It still seems difficult to comprehend how merely yards away blankets and tables were left undisturbed. With safety as our top priority we are cooperating with the City and law enforcement to see what, if anything, might be done to prevent such an incident in the future."

After a waterspout came ashore on the Florida beach on Monday, it hit an inflated bouncy castle, tossing it into the air and injuring three children. Video provided to ABC News by Brandon Burchett shows the swirling column of wind and ocean water head straight towards the amusement ride. The bouncy castle then got caught in the wind and flipped over repeatedly before it was swept even further up in the air.

The Fort Lauderdale Police Department said three children were injured. One was held overnight for observation and two were treated for minor fractures and released, police said.