HOUSTON, TEXAS – A small stray dog trapped inside a flooded storm drain survived a desperate overnight rescue after emergency crews discovered him struggling to keep his nose above rising water deep beneath a busy city road.

The rescue began shortly after 10:30 p.m., when severe thunderstorms brought torrential rain to several neighbourhoods across Houston.

As water rushed along the streets, a delivery driver stopped at an intersection after hearing a faint barking sound beneath a storm drain cover.

At first, he thought the noise was coming from a nearby house.

Then he heard it again.

Three short, frightened barks.

The sound was coming from underground.

The driver crouched beside the metal grate and directed his phone flashlight into the darkness.

He couldn’t see anything.

But beneath the noise of rushing water came another desperate whimper.

He immediately contacted emergency services.

When a specialist rescue team arrived, rainwater was already flowing rapidly through the drainage system.

Firefighters secured the surrounding roadway and deployed a waterproof inspection camera through an accessible maintenance opening.

The first images showed murky water, floating debris, and the narrow concrete walls of the underground pipe.

Then something moved.

A tiny brown dog was trapped on a partially submerged maintenance ledge inside the drainage channel.

His soaked fur clung tightly to his thin body, and muddy water swirled around his chest.

He was standing on his hind legs, pressing his front paws against the concrete wall.

His neck stretched upward.

Only a narrow pocket of air remained beneath the curved ceiling.

The puppy was struggling to keep his nose above the water.

The rescue team estimated that he was approximately eight months old.

They temporarily called him Leo.

Investigators believed the stray had entered the drainage system through an exposed outlet while seeking shelter from the storm.

But as the rainfall intensified, water levels rose rapidly, leaving him trapped inside a section of pipe with no accessible exit.

The camera showed Leo repeatedly trying to climb the slippery concrete wall.

Each attempt ended the same way.

His paws slipped.

He dropped back into the cold water.

Then he pushed himself upright again.

The rescuers quickly realised that the remaining airspace was shrinking.

A conventional rescue net could not reach the dog from the street opening.

And the water current made entering the main drainage tunnel extremely dangerous.

The incident commander coordinated with municipal drainage personnel to assess flow conditions and identify an accessible service chamber downstream.

Crews established a controlled rescue position and prepared a specially secured retrieval system.

Meanwhile, the camera remained focused on Leo.

His movements were slowing.

His front paws no longer reached as high against the wall.

Occasionally, his chin touched the water.