Dabi's been overheating a lot whenever he used his Quirk, and his high pain tolerance made it hard for him to feel it. Therefore, he's been dragging you along with him as his personal cooler.

He was practicing one of his abilities, creating blazes on the surroundings of the hideout. You noticed how his pores started to release smoke due to his flesh slowly burning from the inside; it was time for him to take a break so you could cool him off.