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.
More top news
British Airways said it was taking the matter "extremely seriously" and is assisting police with their enquiries.
Firefighters in Abingdon have carried out a rather unusual rescue after a 17 year-old bellringer became tangled in bell ropes.
Saturday's weather for the west