This Morning's soap correspondent Sharon Marshall announced the news on today's edition of the ITV1 magazine show after seeing some of the scenes being filmed yesterday.
Emmerdale's team have been filming the dramatic moment on night shoots this week. However, exact details of the stunt are being kept closely under wraps for now.
Sharon said today: "The cast and crew are working every single night until 3am in the morning. It's a top secret stunt - they've got a stunt crew, fire engines, paramedics on stand-by. They're really big scenes coming up in about six weeks' time which are top secret."
She added: "It's going to be big."
Meanwhile, the Keighley News reports that the filming has been taking place on the moors above Silsden and Riddlesden in West Yorkshire.
An Emmerdale spokesperson told the publication: "It's a big dramatic storyline that will be on screen in February. It does involve a big stunt so we've had paramedics and fire crews."
Emmerdale continues at 7pm on ITV1.
> Read our recent interview with Emmerdale's Danny Miller about the NTAs and Aaron Livesy's future
> Read all the latest Emmerdale spoilers and news
What do you think the stunt will be? And who could be involved? Share your theories via the usual box below!