I agree it's at least bordering on a "misuse". But the weatherman seems to be stumbling over his words anyway, and I suppose maybe we can also slightly excuse him because he imagines his audience are still totally committed to dealing with the current UK heatwave since his last broadcast (so he means "carry on dealing with it as you were yesterday"). More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.