A photo of a firefighter cradling an infant girl is warming hearts across the country, writes dailymail.co.uk.

'It's moments like this, that I am reminded, this is why I do the job,' said Fire Captain Chris Blazek, in a statement about the incident on Saturday in Chattanooga, Tennessee.

The Chattanooga Fire Department shared the photo on Facebook where it quickly spread, getting over 2,000 shares. 

Blazek was exhausted after responding to a house fire, and was just about to get into the firehouse shower when a call came in about a car incident on Highway 58. 

A pregnant mother was driving the crashed vehicle and had her three young daughters, ranging in age from 7 years to four months, in the back seat. 

'The mother was hysterical because she was having abdominal and back pain,' Blazek recalled. 

'Both big girls were fine, but the baby was screaming hysterically too. So I took her out of her car seat and did a quick physical exam to make sure she was okay,' the fire captain said. 

'She immediately laid her head on my shoulder. Shortly after that I decided that my guys had the scene under control, so I decided to sit and take a break with my new friend. She immediately fell asleep in my arms.'

he mother was transported to a hospital for a medical evaluation, and Blazek's crew remained on the scene until the girls' other family members could arrive.

The children were then given safely into the care of the family members. 

The photo of Blazek was taken by Kyle Vradenburgh, a fellow Engine 6 firefighter. 

'For firefighters, this is what's it's all about,' the department wrote of the heartwarming picture.