Desperate American father of Texas  smashes his car's windshield to rescue his baby he forgot in a car amid 100F+ temperatures 

By Edward Era Barbacena

This is the incredible moment a desperate father smashes his car's front windscreen to rescue his baby from a dangerously hot car as a 'heat dome' settles over 300million Americans.

The distressing video shows a man repeatedly trying to shatter the window with a tire iron to save his baby from the car in a parking lot in Arlington, Texas.

Amid the 100-degree heat, worried passers-by watch on before a second man arrives with a larger pole.

Eventually the two created a hole big enough for someone to climb through and retrieve the child.

Harlingen Police said the baby's parents accidentally locked the car keys inside the vehicle with the baby as the heat started to intensify at around 10.30am Wednesday.