23/06/2026
Overnight thunderstorm and flash flooding alert.
Following the heavy thunderstorm last night there may be localised flash flooding and problems caused by heavy rain.
The council's advice to us is;
"When flooding occurs, it can be confusing who to report incidences to, so we have ensured that Merton’s flooding web page is updated with all the relevant contacts.
If residents or businesses contact you about potential flooding, please refer them to this page https://www.merton.gov.uk/streets-parking-transport/streets-and-pavements/flooding/guidance/report
Report a blocked highway drain (road gully) on the street https://www.merton.gov.uk/streets-parking-transport/street-cleaning/drain-and-sewer-problems Merton’s emergency out of hours telephone number is 020 8543 9750
Water mains bursts or leaks, sewer flooding or flooding from manholes - report any clean water leaks or bursts or sewer blockages, sewage flooding or surface water flooding from manholes to Thames Water online https://www.thameswater.co.uk/help/report-a-problem #/view-and-report-problems or via tel. 0800 3169 800
River flooding - If there is river flooding (such as from the River Wandle, River Graveney, Beverley Brook or Pyl Brook), please contact the Environment Agency https://www.gov.uk/report-environmental-problem or 0800 80 70 60 (lines are open 24 hours). Please note that pollution events should also be notified to the Environment Agency via this telephone number.
If in doubt, please report flooding to both the Council and Thames Water online via the links above.
The Met Office Weather Warnings are issued here: https://weather.metoffice.gov.uk/warnings-and-advice/accessible-uk-warnings
The Environment Agency Flood Warnings or Alerts are issued here: https://check-for-flooding.service.gov.uk/alerts-and-warnings
By reporting flooding online, we will have a single list of properties and/or people affected and we will be able to direct our resources to areas most in need. "
Daniel has had a look online and see that there are reports already on both the council's website and Thames Water for Delamere Road which was badly affected overnight. The Thames Water website claims they'll send someone out within 24 hours. The council one doesn't show a timeline but they are aware of this.
Report flooding Find out who to tell if there is a flood. Flooding from a river If one of the following rivers is flooding, please contact the Environment Agency on 0800 80 70 60 (lines are open 24 hours). River Wandle Beverley Brook Pyl Brook (including East Branch) River Graveney Bunce's Ditch Th...