Flash Flood Risk on Tuesday, 18 August 2026: Lucknow, Patna and Kolkata on Alert Today
Flash flood risk is elevated for Lucknow, Patna, and Kolkata on Tuesday, 18 August 2026. All three cities are on WATCH due to forecasted high river flows and expected rainfall, with Patna and Kolkata anticipating intense rain bursts. Residents should monitor local conditions.
Lucknow, Patna, and Kolkata are on a flash flood WATCH today, Tuesday, 18 August 2026, as forecast models indicate elevated river flows and significant rainfall.
| Cities and Areas on Alert — Tuesday, 18 August 2026 | ||
|
Lucknow
Watch — river flow 2.1× normal — 19 mm rain expected |
Patna
Watch — river flow 1.6× normal — 36 mm rain expected — bursts up to 17 mm/hr |
Kolkata
Watch — river flow 1.8× normal — 13 mm rain expected — bursts up to 7 mm/hr |
In Lucknow, river flow is predicted to be 2.1 times normal with 19 mm of rain expected. Residents should be aware of potential waterlogging and travel delays. Patna faces a similar situation with river flow at 1.6 times normal and 36 mm of rain forecast, including intense bursts up to 17 mm per hour. This could lead to localized flooding, particularly in low-lying areas, and disrupt daily commutes. Patna Weather Forecast & Update for Today, Tuesday, 18 August 2026: Expect Thunderstorms and Hail, High of 32°C.
Kolkata is also under a WATCH, anticipating river flow 1.8 times normal and 13 mm of rain, with peak hourly intensity reaching up to 7 mm. While the intensity is lower, residents should remain vigilant for localised water accumulation. This outlook is based on current river-discharge and rainfall forecasts; conditions are subject to change.
Disclaimer: AI tools assisted in compiling the foundational data and research for this report. The final content was reviewed, edited and verified by human editors at LatestLY.
(The above story first appeared on LatestLY on Aug 18, 2026 08:51 AM IST. For more news and updates on politics, world, sports, entertainment and lifestyle, log on to our website latestly.com).