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Flooding in Plymouth - facts and figures

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Floods in Plymouth, August 2020All of the roads that were closed or blocked by yesterday's flooding have now reopened. It certainly was some storm!

We've had a chat with our friends at the Met Office who tell us that their weather station at Mountbatten recorded 28.0mm of rain between 7am and 2pm yesterday, including 17.4mm in a single hour between 12 noon and 1pm.

To put that into perspective, the average for August is 67.4mm, meaning we saw more than a quarter of the month's expected rainfall in just 60 minutes.

Simply put, the drainage and sewerage system in Plymouth was not designed to be able to cope with that amount of water. The problems weren't localised to just Plymouth, either. Cities and towns across the south, from Looe right up to Winchester, also had similar flooding issues.

Yesterday, we received 208 reports relating to flooding or damage caused by flooding; 144 of them came between 1.30pm and 4pm.

During the busiest part of the day, we had 22 people were out and about dealing with flood issues, with the last job finishing at 11pm when the final lane closure at Wolseley Road was lifted.

Our highways team are responsible for around 39,000 gullies and drains across the city and have an ongoing programme to keep them clear. As a matter of routine, they carry out routine inspections and cleansing and, just like yesterday, are on hand to respond to flooding incidents in severe weather.

We target resources where they are most needed and use smart water sensors to measure how gullies are performing and identify potential flooding risks.

Blocked gullies that are in flooding hot spots, on the main road network or actually affecting residential properties will always be prioritised.