F. Javier Gutiérrez - Tres días AKA Before the fall (2008)

What would you do if the world was going to end in 72 hours?
The U.N. Secretary General has announced that a gigantic meteorite will collide with the Earth in three days time. There is no hope of survival after the impact. The world is swept by despair, chaos and death. The inhabitants of the isolated town of Laguna listen in terror to the news.
Seeing the collective hysteria, Ale, a frustrated young man who lives with his mother and does odd jobs around the town, decides to spend his final days shut away in his house, getting drunk and listening to his favorite music.
But his plans change suddenly when he finds himself forced to help his mother, Rosa, to protect his brother's four children against the arrival of Lucio, an ambiguous, disconcerting stranger with obscure intentions
Ale, Rosa, Tomas... real characters in a real setting: LAGUNA, an isolated town somewhere in the south of Spain. The initial treatment of the story, apparently conventional, takes a sudden turn, just like the story Itself when a staggering news report shatters the monotonous existence in LAGUNA. Within three days Humanity will be wiped out... three last days in which a series of events will propel our characters towards a violent and unexpected end.