New Regency and Summit Entertainment have resumed shooting on “The Darkest Hour” in Moscow, six weeks after Russia’s wildfire emergency shut down the action-thriller.

The companies noted Wednesday that the delay won’t affect plans to release the film in the United States on Aug. 5. Fox handles the international release.

Production began on July 18, but was suspended after three weeks due to the wild fires in Central Russia, which led to thick smoke shrouding Moscow and making filming in the city impossible.

Chris Gorak is directing from a screenplay by Jon Spaihts, based on the script by Leslie Bohem & M.T. Ahern. “Hour” stars Emile Hirsch, Olivia Thirlby, Max Minghella, Rachael Taylor and Joel Kinnaman with Tom Jacobson and Timur Bekmambetov producing.

“Hour” centers on five young people who find themselves stranded in Moscow, fighting to survive in the wake of a devastating alien attack. Project marks the first American 3D production to film in Russia with locations including Red Square, GUM Department Store, the Lenin Library and Square and the Academy of Science Plaza.