Watch Hurricane Irma in real time as it travels along its destructive path by using this graphic.

The storm weakened on Monday morning as it headed towards Tampa, on the Western coast of Florida.

It pummeled the Florida Keys on Sunday, with winds up to 130mph, swamping homes and boats, knocking out power to millions and toppling massive construction cranes over the Miami skyline.

The 400 mile-wide storm blew ashore in the mostly cleared-out Florida Keys, then marched up its western coast, its punishing winds extending clear across to Miami and West Palm Beach on the Atlantic side.

Millions were evacuated while tens of thousands took shelter after a state of emergency was called.