Flood Alert Issued for Tidal Thames Riverside from Putney to Teddington

Source: Environment Agency · Greater London

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The Environment Agency has issued a flood alert for the Tidal Thames riverside, with high tides expected to cause localized flooding in several London boroughs Wednesday afternoon.

What this Environment Agency flood warning tells you, and what most readers miss

This notice was issued by Environment Agency on February 20, 2026 and geographically references Greater London. Its severity classification of "low" signals how the issuing agency weighs the risk of harm if no action is taken — "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to — Flood Warnings — determines the regulatory framework behind it, which shapes what remedies (refunds, replacements, recalls, evacuations) are available to affected individuals and who holds statutory responsibility for enforcement.

Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to read it as a data point about the issuing system: how quickly Environment Agency detected the hazard, how precise the geographic or product-identifier scope is, and whether similar notices have clustered in the same category or region in the last 90 days. Cluster patterns frequently precede a broader regulatory action — a single localized Environment Agency flood warning is isolated; three of them within a quarter often indicate a supply-chain, infrastructure, or seasonal driver that will keep producing notices until something structural changes.

For decision-making, Areazine pairs each alert with the original agency URL, the full agency name, and a timestamp so you can verify the notice against the primary source before acting on it. Tags on this item (weather, alert, Flood Alert, Greater London) map to related alerts in the same area of risk — browsing them together gives a clearer picture than any single notice alone, because the shape of an ongoing issue only becomes visible across multiple sequential alerts.

Alert Details

The Environment Agency has issued a flood alert for the Tidal Thames riverside. This alert, designated as severity level 3, indicates that flooding is possible due to rising astronomical tide levels.

Affected Areas

The alert covers the geographic region of Greater London, specifically affecting the boroughs of Hammersmith and Fulham, Hounslow, Richmond upon Thames, and Wandsworth. The primary area of concern is the riverside from Putney Bridge to Teddington Weir. Specific locations identified as having a possibility of flooding include:

  • Putney Embankment (SW15)
  • Chiswick Mall and Strand on the Green (W4)
  • Thames Bank at Mortlake (SW14)
  • Ranelagh Drive (TW1)
  • Friars Lane and Water Lane (TW9)
  • Riverside and The Embankment at Twickenham
  • The Towpath below Teddington Lock

What You Should Do

Residents and visitors in the affected areas are advised to take care and avoid walking, cycling, or driving through flood water. The Environment Agency is closely monitoring the situation as river conditions evolve.

Expected Conditions

High tides are expected to lead to localized flooding. At Richmond, the forecast high tide is 4.87 mAOD. While riverside paths and roads may be impacted, flooding of properties is not currently expected. The river flow at Teddington Weir is currently steady at 270 cubic metres per second, though flows are anticipated to begin rising tomorrow.

Timeline

Flooding is possible between 2:30 PM and 4:30 PM on February 18, 2026. The peak tide at Richmond is forecast for 3:30 PM. This message is scheduled to be updated by 8:00 PM on February 18, 2026, or sooner if the situation changes.

Original source: Environment Agency Official Notice ↗

All Flood Warnings →

Frequently Asked Questions

Common questions about this Environment Agency flood warning.

What is this Environment Agency flood warning about?
The Environment Agency has issued a flood alert for the Tidal Thames riverside, with high tides expected to cause localized flooding in several London boroughs Wednesday afternoon.
Which agency issued this alert?
This alert was issued by Environment Agency. The original notice is available at the source link at the bottom of this article.
How severe is this alert?
This alert is classified as "low" severity. No immediate action required, but stay aware.
What area is affected?
This alert affects Greater London. Check with Environment Agency for the most current geographic scope.
Where can I find more Flood Warnings updates?
Browse the full Flood Warnings feed on Areazine at areazine.com/uk/floods/ for the latest updates from Environment Agency and other agencies.