Fire Force manga volume 30 features story and art by Atsushi Ohkubo.

The Great Cataclysm has begun! Deadly battle erupts across the land, pitting the Special Fire Force against the harbingers of destruction! A doppelganger of Rekka appears before Company 1, sparking new despair. Shaken by this cruel reunion, Karim will have to make a difficult choice. Meanwhile, Arthur and Vulcan face the ultimate test to get back to Yū, who has been possessed by Dr. Giovanni. The final confrontation between knight and dragon looms!