Will Seeduwa flood in the next hour?

Seeduwa flood risk right now: Minor flood. This is an estimate based on the Dunamale gauge on the Aththanagalu Oya (23 km away), which read 15.1 ft as of Tue, 27 Oct, 1:02 am (Sri Lanka time). In the next hour the Aththanagalu Oya at Dunamale could rise to about 15.2 ft (15.1–15.4 ft). This is a forecast for the river, not an official warning, and streets can flood before the river reaches a flood mark.

How is the flood risk for Seeduwa worked out?

From the nearest river gauge ({gauge}, 23 km away), recent and expected rain, the gauge's forecast and any official warning. It is an estimate for the town, not an official warning, and streets can flood before the river reaches a flood mark.

Where does this come from and how often does it update?

River readings come from the Department of Irrigation's gauges, roughly once an hour, and this page checks for new ones every minute. This site is independent and not an official warning service: follow the Disaster Management Centre and call 117 in an emergency.

Is Seeduwa flooding?

Seeduwa, Gampaha

Seeduwa flood risk right now: Minor flood. This is an estimate based on the Dunamale gauge on the Aththanagalu Oya (23 km away), which read 15.1 ft as of Tue, 27 Oct, 1:02 am (Sri Lanka time).

Reading at 1:02 am · 47 min ago

Minor flood

15.1 ft

Next hour

River rising slowly

Next 24 hours

Risk stays high

Leave low areas near the river

Experimental estimate. There is no river gauge in Seeduwa; this uses Dunamale, 23 km away, plus rain at the town and official warnings.

Call 117 Gampaha DMC office

Details

How this estimate works

· Starts from the river gauge's own level and forecast, the same as the gauge page.
· Heavy rain here (50 mm in 6 hours or 100 mm in 24 hours) raises it by one step, never more.
· Your own street level, if you set one, and official warnings can raise it further.
· It never says flooding is happening: only a measurement can show that.

Why

Irrigation Department has issued a flood warning for Aththanagalu Oya
Aththanagalu Oya at Dunamale is 15.1 ft, rising (at minor flood level)
61 mm of rain in the last 24 hours
Water in Seeduwa drains through canals into the river. When the river is high, rain can stay on the lowest ground near them.

Your river

Dunamale

Aththanagalu Oya · 23 km away

Minor flood15.1 ft1:02 am

Badalgama

Maha Oya · 23 km away

Alert18.5 ft

Is this right?

Each answer helps us improve the forecast for your area.

Based on: Dunamale gauge on the Aththanagalu Oya, 23 km away

Set your street's flood level

At what Dunamale reading does water reach your street? Saved on this device only, never sent anywhere.

Rain in Seeduwa

Moderate rain in the last 24 hours (61 mm). Moderate rain expected this afternoon, about 15 mm in the next 24 hours.

mm per hour

Tap or hover a bar to see that hour.

Rain map

Did the streets near you get water today?

Your answer helps us check our warnings. It is anonymous: we save only the town and your answer. Nobody sees single answers; we show only totals of 3 or more.

When? (optional)

Official flood map

In the Irrigation Department's maps of past floods (Aththanagalu Oya 2018), these Grama Niladhari divisions around Seeduwa were partly or fully under water:

Bandarawatta West2018
Dambaduraya2018
Alawathupitiya2018
Bandarawatta East2018
Ambalammulla2018
Udammita North2018
Udammita South2018
Seeduwa2018
and 2 more nearby

This shows where a past flood reached, not a flood now. A bigger flood can go further.

Flood help and phone numbers

Common questions

Is Seeduwa flooding now?: Seeduwa flood risk right now: Minor flood. This is an estimate based on the Dunamale gauge on the Aththanagalu Oya (23 km away), which read 15.1 ft as of Tue, 27 Oct, 1:02 am (Sri Lanka time).
Will Seeduwa flood in the next hour?: Seeduwa flood risk right now: Minor flood. This is an estimate based on the Dunamale gauge on the Aththanagalu Oya (23 km away), which read 15.1 ft as of Tue, 27 Oct, 1:02 am (Sri Lanka time). In the next hour the Aththanagalu Oya at Dunamale could rise to about 15.2 ft (15.1–15.4 ft). This is a forecast for the river, not an official warning, and streets can flood before the river reaches a flood mark.
How is the flood risk for Seeduwa worked out?: From the nearest river gauge ({gauge}, 23 km away), recent and expected rain, the gauge's forecast and any official warning. It is an estimate for the town, not an official warning, and streets can flood before the river reaches a flood mark.
Where does this come from and how often does it update?: River readings come from the Department of Irrigation's gauges, roughly once an hour, and this page checks for new ones every minute. This site is independent and not an official warning service: follow the Disaster Management Centre and call 117 in an emergency.

Aththanagalu Oya · Sources: Department of Irrigation gauges, Open-Meteo rain, Disaster Management Centre warnings.