The child’s death was recounted by a volunteer who had travelled to Antigua and Barbuda to offer help to victims.
Volunteer Eli Fuller described how he met a distraught mother in Barbuda who had just seen her child dragged out of her ams by the ferocious winds of the category 5 storm.
In a video posted to Facebook, Mr Fuller recalled the harrowing scenes left behind by the devastating storm.
He said: “[The mum] came down to the dock, and she was wrapped up in bandages all over her face [which had] been busted in, and she says, ‘Yeah, you know, I was the lady who lost the child.'”
She told him that her roof had been blown off her house in the storm and as she sat protecting her child, the toddler was dragged away from her.
He said: “She had her arm around a post after the roof blew off and walls [were] caving in and she had her other arm around the child – and she says the wind just pulled the child out of her hands.
“And that was the last they saw of the child, [until] they found the child the next morning, dead.”
Mr Fuller said that the storm had been so catastrophic it was like a nuclear bomb going off.
He said: “You’ve seen photos of Hiroshima and Nagasaki after they dropped the nuclear bomb. It looks like that.”
Irma’s mighty sustained winds of 185mph and rain left a trail of devastation throughout the Caribbean.
At least 15 people are dead from Irma’s wrath in parts of the Caribbean.
Nearly every building on the island of Barbuda was damaged when the eye of the storm struck early on Wednesday.
Antigua and Barbuda Prime Minister Gaston Browne said Irma had left about 60 per cent of the island’s roughly 1,400 people homeless.
About a million people were without power in Puerto Rico after Irma sideswiped the island, but there were no immediate reports of large-scale casualties.
Local people said the winds were so strong that some people tied themselves down on a roof in order to stay put.
Knacyntar Nedd, told ABS TV: “We had cars flying over our head, we had 40ft containers flying left and right.
“What we experienced is like something you see in a horror movie, not something you expect to actually happen in reality.”