Millions of people along the south east coast of the US are being told to flee in land, as the deadliest storm in a decade approaches.
Hurricane Matthew's already killed hundreds in Haiti.
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The storm's now been downgraded to a Category Three – but the US authorities are warning those who stay in their homes, they may be risking their lives.
TV presenter Diane Knox is in Jacksonville – and is praising the authorities for what they've done so far.
