Soaring levels of air pollution have triggered a health alert for the south-east, with the elderly and people with lung and heart condtions told to avoid strenuous physical activity.
The region's worst air pollution for many years has been caused by a combination of local emissions, light winds, pollution from the continent - and dust blown in from sandstorms in the Sahara Desert.
The red dust - which has covered thousands of cars across the region - is a potential health hazard for asthmatics and others sensitive to air pollution. Pollution levels remain high tonight but are expected to ease in most areas tomorrow.
David Johns reports, speaking to health expert Dr Rossa Brugha, Councillor Graham Gibbens (Con) of Kent County Council, and carwash owner David Charman.