A Met Office weather warning is in place amid flooding in Hertfordshire this morning.

Rain warnings have been in place all weekend with a fresh yellow alert having come into effect at midnight to last all today (September 23), covering most of England and Wales including all of Hertfordshire.

Residents have been advised to avoid certain areas and allow more time for any journeys by road and rail as routes have been significantly disrupted.

The Met Office said: “There is potential that 30 to 50 mm could develop in any part of the warning area, much of which could fall in six hours or less.

“Some locations could see 80-100 mm over the course of 12 to 24 hours.”

An amber warning for rain is in place across much of the midlands, but it does not extend to Hertfordshire.

Herts Police and the county council have warned motorists to avoid flooded roads, including the A41 near Costco Watford and the A505 in Hitchin.

London Northwestern Railway lines between Watford Junction and London Euston were closed in the early hours of the morning (September 23).

Lines reopened by 6.07am but delays and cancellations remain and are expected to continue until 7.30am.

Thameslink has also warned that many of its services, including those through Hertfordshire, have been hit by disruption. Trains are currently running through London St Pancras and Farringdon at reduced speeds due to flooding.

Trains on the Abbey Line, between Watford Junction and St Albans Abbey are suspended due to a train fault. It is currently unclear whether this is related to the heavy rain.

Residents on the road in Hertfordshire early this morning raised concerns that travel would be “chaos” later-on.

The Met Office also warned that temperatures are set to drop to below-average levels for the time of year across the country this week.