security
Updated 2026-08-20 5 min
In short
- ●Cambodian authorities have been ordered to intensify flood preparedness due to rising waters along the Mekong, Bassac, and around the Tonlé Sap.
- ●A storm is expected, which could worsen the situation in the coming days.
- ●Expats in Siem Reap should monitor water levels and weather forecasts, especially near the lake.
- ●Concrete measures are recommended to ensure the safety of people and property.
Mekong, Bassac, Tonlé Sap
Affected areas
August 20, 2026
Alert date
Heightened
Preparedness level
Cambodianess
Source
Key Facts at a Glance
- Rising waters. Water levels are increasing along the Mekong, Bassac, and around the Tonlé Sap lake.
- Storm expected. A storm is forecast, which could increase flood risks.
- Official directives. Local authorities have been ordered to strengthen flood preparedness.
- Impact on Siem Reap. Areas near the Tonlé Sap lake are particularly affected.
- Vigilance required. Expats should monitor weather forecasts and water levels.
How It Unfolded
The rainy season in Cambodia is intensifying, leading to a gradual rise in water levels. Here are the key steps of this alert.
- Early August 2026: Seasonal rains intensify, causing river levels to rise.
- Mid-August 2026: Authorities note a significant increase in water levels along the Mekong and Bassac.
- August 19, 2026: Weather forecasts announce an imminent storm.
- August 20, 2026: The government orders local authorities to strengthen flood preparedness.
- Coming days: Rescue teams are on alert, and preventive evacuations may be triggered if necessary.
Breakdown
The most exposed areas are those along major waterways and around the Tonlé Sap lake. Here is an overview of at-risk zones.
| Zone | Risk level | Details |
|---|---|---|
| Mekong (Kratie province) | High | Rapid rise in waters, risk of overflow |
| Bassac (Kandal province) | High | Tributary of the Mekong, heavy rains expected |
| Tonlé Sap (Siem Reap province) | Moderate to high | The lake may overflow, affecting floating villages |
| Phnom Penh | Moderate | Low-lying areas near the river, enhanced monitoring |
| Battambang province | Moderate | Tributaries of the Tonlé Sap, risk of flash floods |
What It Means for Siem Reap
- Travel to the floating villages on Tonlé Sap may be disrupted or temporarily prohibited.
- Roads leading to the lake may become impassable, especially after heavy rains.
- Tourist activities around the lake (cruises, visits) may be suspended as a safety measure.
- Expats living near the riverbanks should prepare an evacuation plan and protect their belongings.
- Power outages and communication disruptions are possible during the storm.
How to Stay Safe
- Step 1: Follow local weather forecasts and official alerts via apps and Telegram channels.
- Step 2: Identify elevated areas and evacuation centers near you.
- Step 3: Prepare an emergency kit with water, food, medications, and important documents.
- Step 4: Avoid driving on flooded roads; water can hide dangers.
- Step 5: If you live near the lake, move valuables to higher ground and cut electricity in case of flooding.
- Step 6: Stay in touch with your embassy and local authorities for safety instructions.
- Step 7: In an emergency, call 117 (police) or 118 (fire) and follow instructions.
Frequently asked questions
Which areas in Siem Reap are most at risk of flooding?
Areas around the Tonlé Sap lake, especially floating villages and riverbanks, are most exposed. Neighborhoods near rivers may also be affected.
What should I do if my home is flooded?
Immediately cut off electricity, evacuate to a safe place, and contact local authorities. Do not walk in the water unless absolutely necessary.
Are flights and tourist activities canceled?
Authorities may temporarily suspend tourist activities near the lake as a safety measure. Check with your operator.
How can I follow real-time alerts?
Follow official Telegram channels like Cambodianess, and local authority accounts. Weather apps like Windy or AccuWeather are useful.
Is there a health risk?
Floods can increase the risk of waterborne diseases. Avoid contact with stagnant water and drink bottled water.
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Published by
Siem Reap Hub
The community guide for expats and travelers in Siem Reap, Cambodia