A 2-year-old Queens girl fell from a second-floor window that was left open during the Big Apple’s recent heat wave, police and sources said Monday.

The girl’s father had just finished giving her a bath in their apartment on 26th Avenue near College Point Boulevard in College Point at about 8 p.m. Sunday when he left her unattended, sources said.

The tot managed to slip away.

“My husband just took her out of the bath and went downstairs to get the hair dryer … And she got onto the [window] ledge and fell off,” mother Jia Jia Zhou, who said she was not home at the time, told The Post.

She continued: “We had the window open because it was so hot outside.”

Cops said while the girl’s father was downstairs, he heard screaming, and when he ran back upstairs to see what had happened, another of his daughters said her sister was jumping on the bed, leaned on the window screen and fell out.

The victim had fallen through the window, which didn’t have a child guard, according to police.

The toddler was rushed to Long Island Jewish Hospital after the fall, and is expected to survive, officials said.

“She’s still in the hospital right now,” Zhou added. “She has a broken right leg.”

Additional reporting by Natalie Musumeci