A picture of a firefighter carrying an elderly woman up some stairs is capturing hearts

(CNN)Firefighter Thomas Harwell says it's always been in his blood to help people, and not just when he's on the clock.

He, his wife Shayla and their 2-year-old daughter were at the Houston Livestock Show and Rodeo featuring Brad Paisley Saturday when they saw an elderly woman struggling to get down the stairs of the stadium with her daughter and two granddaughters.
Shayla (left) and Thomas Harwell.