The areas under threat are Yalding, Allington and parts of Maidstone with Smarden and Headcorn are on alert too. Other areas include the upper River Medway from Forest Row to Penshurst, including Ashurst.
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Philippa has Monday's weather for the east
Philippa has Monday's weather for the west
The airline says it aims to resume most UK flights today - but experts warn it could take days for services to return to normal.