The Mist (2007)

A violent storm hits a town in Maine, then an approaching cloud of mist appears the next morning. As the mist quickly envelops the area, a group of people get trapped in a local grocery store, among them, artist David Drayton and his five-year-old son. The people soon discover that within the mist lives numerous species of horrific, unworldly creatures that entered through an inter-dimensional rift, possibly caused by a project on a nearby military base. As the world around them turns into a literal Hell-on-earth, the horrified citizens try desperately to survive this apocalyptic disaster.