"We've assessed that we've had close to 150ml in the last couple of days, which is absolutely unprecedented in our region," Francis said.
"It was exceptional rain, and it just never stopped.
"It became a major health and safety issue, particularly due to the site becoming so waterlogged."
Local woman Mikaela Bowmar said it was not just the event closure, but also the travel chaos, that left their weekend in tatters.
Shortly after Wings Over Wairarapa was cancelled on Saturday, the Wairarapa was effectively cut off from Wellington by a diesel spill that closed Rimutaka Hill Rd.
Mikaela Bowmar and her family were devastated to be locked out of the event, after leaving home at 6.30am for a full day of planes. Photo / Mikaela Bowmar.
"We got tickets back in November, as Christmas presents for our two kids," Bowmar said.
"They're 7 and 9, and they're little plane buffs, the pair of them.
"We live in Lower Hutt, so we were on the road at 6.30am, because we wanted to be there from the beginning.
"And we were, but just as we got there they closed the gates, because the call had come through to cancel it."
A bad day gets worse when disappointed Wings fans are trapped by a road closure. Photo / Mikaela Bowmar.
The family reluctantly turned around to head back home, but were soon trapped.