August is getting hotter, but not because of the weather.

Tulsa Firefighters revealed their 2018 calendar Thursday night with News On 6’s own Tess Maune emceeing the event. This year's calendar features firefighters from 25 to 53 years old.

One firefighter said, "I'm 53 years old.  And so, I think it’s just a testament to what determination and endurance can do for you. Just stick with it and don't quit and you can maintain what you got."

Guests got to vote on which firefighter goes on the cover. Money raised from Thursday’s event goes to the Tulsa Fire Museum.