In what many are calling a miracle, a pregnant woman who vanished in the deadly floodwaters outside Houston has been found alive — thanks to an unknown dog now hailed as a hero.

When the floodwaters surged through the outskirts of the city, residents feared the worst. The woman, who had gone missing during the chaos, was last heard screaming for help — her voice soon swallowed by the roar of the storm. Search efforts stretched on for hours with no sign of her.

But nearly 10 hours later, hope re-emerged from the rooftop of a partially submerged home. A rescue team spotted a faint movement — not the woman, but a dog. Soaked to the bone and barking frantically, the dog refused to leave a soaked tarp nestled on the roof.

When medics lifted the tarp, they discovered the unimaginable: the missing woman, unconscious… and in her arms, a newborn baby.

“She gave birth alone during the storm,” said EMT Laura Gibbons. “If that dog hadn’t stayed by her side and shielded the baby with his own body, neither of them would have survived the night.”

No one knows where the dog came from. He simply appeared as the waters rose — and stayed. Locals have given him a fitting name: Guardian.

“He never barked for help for himself. Only for her. Only for the baby,” said one of the rescuers. “He didn’t move. He just waited. Like he knew it was his job.”

Both the mother and baby are recovering in stable condition. As for Guardian? He’s currently being cared for at a local shelter — though it’s likely he won’t stay there long.

“After what he did,” one officer said, “I think there’s a line of people ready to give him a forever home.”

A mystery dog. A miracle birth. And a storm that couldn’t wash away the loyalty of a guardian angel with four legs.