Flood Alert Issued for Tidal Thames Riverside from Thames Barrier to Putney Bridge
This alert is no longer in effect.
Environment Agency issued it on April 6, 2026, 4 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this Environment Agency flood warning directly from Environment Agency's official public data feed. See our methodology for full source attribution and refresh cadence.
The Environment Agency has issued a flood alert for the River Thames in London, effective Thursday afternoon due to a combination of high tides and increased river flows.
Read this weather record in 30 seconds
- Record type
- Flood Alert
- Affected area
- Greater London
- Issued
- April 6, 2026
- Issuing authority
- Environment Agency
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Greater London.
Alert Details
The Environment Agency has issued a flood alert for the Tidal Thames riverside, stretching from the Thames Barrier to Putney Bridge. The alert was issued on the morning of Thursday, February 19, 2026, following forecasts of high tides combined with high river flows from upstream.
Affected Areas
The alert covers a broad geographic scope across Kent, South London, and East Sussex, specifically affecting the following counties and boroughs:
- City of London and Greater London
- Greenwich, Hammersmith and Fulham, Kensington and Chelsea
- Lambeth, Lewisham, Newham, Southwark
- Tower Hamlets, Wandsworth, and Westminster
Specific locations with a possibility of flooding include Custom House (EC3R), Narrow Street (E14), the Mayflower and Angel pubs (SE16), the Royal Naval College riverfront, the Almshouse Slipway at Crane Street (SE10), Bankside by the Tate Modern (SE1), and Three Mill Island (E3).
What You Should Do
Residents and commuters are advised to take care and avoid walking, cycling, or driving through flood water. The Environment Agency is currently checking flood defences in the area to mitigate potential impacts.
Expected Conditions
Flooding is possible due to high tides and high upstream river flows. The forecast high tide at London Bridge is 4.50 mAOD, expected at 03:00 PM on February 19. The river flow at Teddington Weir is currently 274 cubic metres per second and is rising slowly. While riverside flooding is possible, the Environment Agency noted that flooding of properties is not expected at this time.
Timeline
The alert is effective from 02:00 PM to 04:00 PM on Thursday, February 19, 2026. Astronomical tide levels are expected to peak tomorrow, and river flows are anticipated to rise slowly over the next few days. This message will be updated by 7:00 PM on February 19, 2026, or as the situation changes.
Original source: Environment Agency Official Notice ↗
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Common questions about this Environment Agency flood warning.