Wakefield had just scored their sixth try to lead 37-16 when spectators were told to evacuate the Princess Street Stand. The club issued a public call for an electrician and the fire brigade were summoned. Referee Ben Thaler had stopped play and, after a delay of around 10 minutes, blew for full time.
If, as seems certain, the result is allowed to stand, it condemns the Tigers to the foot of the table for the first time this year after going down to a fifth successive defeat.
The Wildcats ran in four first-half tries without reply and withstood a second-half fightback from their hosts to claim a first win in five matches.
Winger Peter Fox got two of Wakefield's five tries but the architects of the victory were Australian scrum-half Tim Smith and former Castleford full-back Richard Mathers, who never seems to fail to remind his old boss Ian Millward of his capabilities.