daily-life
Updated 2026-08-28 5 min
In short
- ●El Niño 2026 is bringing earlier storms and higher temperatures to Cambodia.
- ●Irregular rains are causing droughts and flash floods, especially along the Mekong.
- ●Homes have been flooded for the first time in five years, affecting areas near Siem Reap.
- ●Expats should monitor weather alerts and prepare emergency kits.
El Niño 2026
Phenomenon
Since August 2026
Period
Cambodia, including Siem Reap
Locations
Cambodianess
Source
Key Facts at a Glance
- Early storms. Thunderstorms are arriving earlier than usual, disrupting the agricultural calendar.
- Rising temperatures. The mercury is climbing, increasing heat stress.
- Irregular rains. Alternating droughts and heavy downpours.
- Mekong flooding. The river is rising, flooding homes for the first time in five years.
- Impact on Siem Reap. Expats must prepare for extreme conditions.
How It Unfolded
The 2026 El Niño phenomenon is manifesting gradually, with visible effects since the start of the rainy season.
- Early 2026: Weather forecasts predict a moderate to strong El Niño.
- May-June: The first storms arrive earlier than normal, surprising farmers.
- July: Drought episodes hit some provinces, while others experience torrential rains.
- August: The Mekong reaches high levels, causing flooding in low-lying areas.
- Late August: Authorities issue alerts and recommend vigilance.
- September-October: The situation is expected to persist, with increased risks of flash floods.
Breakdown
The impacts of El Niño vary by region and sector.
| Segment | Number | Detail |
|---|---|---|
| Provinces affected by drought | 5 | Mainly in the northwest |
| Provinces affected by flooding | 8 | Along the Mekong and Tonlé Sap |
| Homes flooded (first time in 5 years) | 120 | In Kandal province |
| Increase in average temperature | +2°C | Compared to seasonal normal |
| Delay in rains | 3 weeks | In some agricultural areas |
What It Means for Siem Reap
- Increased risk of flooding in low-lying areas near rivers and Tonlé Sap lake.
- Possible power outages during severe storms.
- Temporarily impassable roads, affecting travel.
- More mosquitoes, thus risk of dengue fever.
- Need to check home insurance for water damage coverage.
How to Stay Safe
- Step 1: Follow weather alerts via reliable apps like Windy or official accounts.
- Step 2: Prepare an emergency kit with water, non-perishable food, flashlight, and power bank.
- Step 3: Avoid driving or walking through flooded areas.
- Step 4: Protect important documents in waterproof bags.
- Step 5: Check your home for leaks and ensure gutters are clear.
- Step 6: Use mosquito repellent and eliminate standing water.
- Step 7: Stay informed of local authorities' instructions.
Frequently asked questions
What is El Niño and why does it affect Cambodia?
El Niño is a climate phenomenon that warms Pacific waters, disrupting rainfall patterns in Southeast Asia. In Cambodia, it causes irregular rains, droughts, and floods.
Which areas are most at risk in Siem Reap?
Areas near Tonlé Sap lake and rivers are most exposed to flooding. Low-lying neighborhoods, such as parts of the city, may be affected.
How can I follow weather alerts in Cambodia?
You can use apps like Windy, AccuWeather, or follow the official accounts of Cambodia's Ministry of Water Resources and Meteorology on Telegram and Facebook.
What should I do in case of a flash flood?
Evacuate to higher ground, turn off electricity if possible, and do not attempt to cross moving water. Contact local authorities if necessary.
Does home insurance cover flood damage?
It depends on your policy. Check if it includes flood-related damage, and if not, consider additional coverage.
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Published by
Siem Reap Hub
The community guide for expats and travelers in Siem Reap, Cambodia