Chris is starting to move northeast around 9 miles per hour.
The national weather forecaster says the storm is now off the coast of Carolina and is expected to begin moving northeast later today.
Chris will begin a northeastern course from late Tuesday off the U.S. Atlantic coast, the center said, adding that projections showed it possibly making landfall in the Canadian province of Nova Scotia late on Wednesday or early on Thursday.
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Tropical systems are capable of becoming much stronger than higher latitude storms called cyclones because tropical cyclones convert warm ocean water into energy which strengthens the warm core in a hurricanes eye.
There is also the risk of heavy showers on Thursday with Storm Chris - the Tropical storm which has now been upgraded to a hurricane - set to batter the United Kingdom over the weekend and in the early part of next week. "Little development is expected during the next day or so due to land interaction and unfavorable upper-level winds".
Chris is forecast to gather strength through Wednesday, but should start weakening by Thursday and revert back to a tropical storm by Friday, according to the NHC.
She said a "blip" in the current hot weather, which is not down to Chris, is seeing temperatures in the south east drop to around 23-25C (73-77F) and further north to 21-22C (69-71F) in Birmingham or 17-18C (62-64F) in Newcastle but temperatures "will increase a few degrees to the weekend".