The cast were shooting the much-anticipated scenes, which will take the lives of two Weatherfield characters, until late yesterday (February 13).
The actress, who plays pub landlady Stella Price, tweeted late last night: "Just got home After major night shoot could never be a night worker!
"Actors, crew and fireman were all amazing had some amazing stunts."
Antony Cotton, who plays Sean, told fans: "Here we go... The big blast!!! #roversfire."
Collins added that "fans will love" the "exciting and dramatic" episode to air next month.
Meanwhile, ITV has confirmed that, contrary to rumours, Stella will remain landlady after the fire. This Morning soap expert Sharon Marshall had previously suggested Michelle Connor (Kym Marsh) would take over.
Sunita Alahan, played by departing actress Shobna Gulati, has been widely tipped to lose her life when the iconic pub goes up in flames next month.
Watch the Rovers Return go up in smoke in this classic 1986 episode below:
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