Since the film is shot near the Esket Reserve in Western Canada, many people of the First Nation were also involved, including Chief Charlene Belleau who blessed the production.

During his time as a teacher at the Center for Arts and Technology Director Mark A. Lewis used parts of his screenplay for The Thaw in his Directing the Actor class.

The movie is inspired by the real concern of global warming unveiling ancient lethal supervira. Numerous different giant vira has already been discovered by scientists in the Siberian permafrost.

One version of the dvd uses the title "Frozen" instead of "Thaw".

The working title of the film was "Bed Bugs".

Special effects used a 1,000 gallon propane tank, sand cannons, gun powder, and piping to blow up a research station.