Siem Reap Hub

Cambodia Floods: 40,000 Families Affected, Siem Reap Hit

As of September 27, 2026, ten Cambodian provinces are experiencing flash floods; Siem Reap is among the hardest hit, with direct consequences for roads, housing, and expat health.

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Updated 2026-09-28 5 min

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In short

  • ●Over 40,000 families affected and nearly 50,000 hectares of rice fields submerged as of September 27, 2026, according to Cambodianess.
  • ●Ten provinces affected, with Battambang, Banteay Meanchey, and Siem Reap among the hardest hit.
  • ●For expats in Siem Reap: road closures, housing damage, and health risks from stagnant water.
  • ●Following local alerts and checking road conditions before any travel remains the immediate priority.
40,000+
Families affected
As of Sept. 27, 2026
Period
10
Provinces affected
Cambodianess
Source

The facts at a glance

  • 40,000+ families. More than 40,000 Cambodian households are affected by flash floods as of September 27, 2026.
  • September 27, 2026. Date of the latest consolidated report published by Cambodianess.
  • 10 provinces. Ten provinces are affected, with Battambang, Banteay Meanchey, and Siem Reap among the hardest hit.
  • 50,000 hectares. Nearly 50,000 hectares of rice fields are submerged, threatening the current harvest.
  • Recommended action. Follow local alerts and check road conditions before any travel.

How it unfolded

The sequence of the September 2026 flash floods spans several weeks, between intense rainfall and the gradual rise in official figures.

  1. Early September 2026: monsoon rains intensify over northwestern Cambodia, saturating watersheds.
  2. Mid-September 2026: the first overflows are reported in Battambang and Banteay Meanchey provinces.
  3. Around September 20, 2026: flooding spreads to Siem Reap and several other provinces, causing secondary road closures.
  4. September 25, 2026: provincial authorities ramp up alerts and preventive evacuations in low-lying areas.
  5. September 27, 2026: the consolidated report states more than 40,000 families affected and nearly 50,000 hectares of rice fields submerged.
  6. September 28, 2026: monitoring remains active; expats are urged to follow official and local channels.
  7. Coming days: water levels are expected to gradually recede, but vigilance remains on roads and flooded areas.

Breakdown

The report published by Cambodianess as of September 27, 2026, allows for distinguishing several impact segments. Provincial figures remain partial and evolve as waters recede.

SegmentFigureDetail
Families affected40,000+All affected provinces as of September 27, 2026
Rice fields submerged~50,000 haDirect impact on the current harvest
Provinces affected10Including Battambang, Banteay Meanchey, and Siem Reap
Hardest-hit provinces3Battambang, Banteay Meanchey, Siem Reap
Priority expat areaSiem ReapRoads, housing, and health to monitor

What it means on the ground in Siem Reap

  • Roads: some secondary roads and rural tracks may be cut off or damaged; check road conditions before any trip to the temples or neighboring districts.
  • Housing: ground floors and low-lying properties are exposed to seepage; inspect drains, roofs, and water outlets.
  • Health: stagnant water breeds mosquitoes and waterborne diseases; avoid direct contact and strengthen protections.
  • Daily life: occasional power outages and delivery delays are possible in affected neighborhoods.
  • Mobility: prefer daytime travel, anticipate detours, and keep an emergency kit within reach.

How to stay out of trouble

  1. Step 1: follow official alerts and local channels (provincial authorities, Cambodian media, reliable expat groups).
  2. Step 2: check road conditions before every trip, especially to rural areas and temples.
  3. Step 3: protect your home: elevate valuables, check drainage, and report any seepage to the landlord.
  4. Step 4: put together an emergency kit: drinking water, flashlight, power bank, important documents, and basic medications.
  5. Step 5: limit exposure to stagnant water and use mosquito repellent.
  6. Step 6: keep useful contacts on hand: landlord, neighbors, insurance, embassy or consulate of your country.
  7. Step 7: for non-essential travel, postpone and prioritize safety over convenience.

Frequently asked questions

Is Siem Reap directly affected by the September 2026 floods?
Yes. Siem Reap is among the hardest-hit provinces according to the September 27, 2026 report published by Cambodianess, alongside Battambang and Banteay Meanchey.
How many families are affected in total?
More than 40,000 families are affected across the ten provinces, and nearly 50,000 hectares of rice fields are submerged.
Are roads around Siem Reap passable?
Some secondary roads and rural tracks may be cut off or damaged. It is recommended to check road conditions before any travel and to prefer daytime trips.
What health risks for expats?
Stagnant water promotes mosquito breeding and waterborne diseases. Avoiding direct contact with water and using repellent remains essential.
Should I cancel planned trips in the region?
Non-essential travel to flooded areas can be postponed. For essential trips, check local conditions and follow authorities' instructions.

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The community guide for expats and travelers in Siem Reap, Cambodia