Firefighters rescued two women and a dog from a second-floor window of a four-family home in the 5100 block of Highland Avenue Sunday morning after smoke from a fire on the main level overtook the second floor.

Capt. Garon Mosby said ladders went up quickly when fire crews got to the home in St. Louis’ Kingsway West neighborhood.

Mosby said as crews were trying to rescue two occupants and the dog, a Yorkshire Terrier, the dog was trying to jump from its owner’s arms. A firefighter was able to grab the dog and drop it to another firefighter below, then rescue the two residents.

Mosby said a preliminary cause for the fire points to wiring in an air conditioner cord on the first floor.

That was one of multiple calls the department ran on Sunday morning, as temperatures climbed into the 90-degree range. The high humidity, which pushed the heat index over 100, wasn’t helping.

At another house fire in the 2000 block of Hickory Street near Lafayette Park, Mosby said fire officials requested additional crews as temperatures climbed so they could rotate firefighters out to hydrate and recuperate.