Expect difficult driving conditions due to heavy rain across Cornwall.
Cameras show that main routes such as the A30, A38 and A39 are affected by surface water and spray.
More top news
The Doc Martin actor has hosted the annual Buckham Fair since 2008 to raise money for local charities.
Helen has the forecast for Devon, Cornwall, Somerset and Dorset.
Helen has the forecast for Bristol, Gloucestershire, Somerset, Wiltshire and Dorset.