More heavy rain overnight in the south-east may delay a clean-up operation following a day of flash floods.
However forecasters said there would not be a repeat of the deluges in East Anglia, the south-east and London today.
The Environment Agency said that "recovery operations may be affected" but that flooding is not expected during the next three days.
Rather than a winter phenomenon, hail is surprisingly common during the most intense summer thunderstorms.
Lightning and hail storms, described by locals as like walking through a 'zombie apocalypse,' causes travel chaos in Brighton.