2 tons of dead fish at Lake Tamouk: climate alert in Siem Reap

• 2,000 kg of dead fish. First mass mortality at Lake Tamouk, a protected conservation area in Siem Reap.
• Extreme heat and low water levels. High temperatures and lack of rain suffocated the fish.
• Risk of further losses. If rains don't come soon, more deaths could occur.
• Protected area affected. Lake Tamouk is an important nature reserve for local biodiversity.
• First incident of its kind. No mass mortality had been reported in this area before.

The mass mortality occurred in a context of drought and record temperatures. Here are the key steps:

1. May 2026: Siem Reap province experiences a prolonged heatwave with temperatures exceeding 40°C.
2. Late May 2026: Lake Tamouk's water level drops critically due to evaporation and lack of precipitation.
3. Early June 2026: Local authorities report the first dead fish floating on the surface.
4. June 2, 2026: The toll reaches about 2 tons of dead fish. This is the first mass mortality recorded in this protected area.
5. Next steps: Authorities are monitoring the situation and fear further losses if rains do not start in the coming days.

Available data does not allow a detailed breakdown by species or sector. However, Lake Tamouk is known to host several typical Cambodian freshwater fish species. Here is a general overview:

• Air and water quality: decomposition of fish can temporarily affect water quality and produce unpleasant odors around the lake.
• Outdoor activities: expats who fish or kayak on Lake Tamouk should avoid the area until the situation is resolved.
• Local ecosystem: the loss of 2 tons of fish disrupts the food chain and may reduce biodiversity in the long term.
• Climate awareness: this event highlights the impact of climate change in Cambodia; expats should prepare for more frequent heat episodes.
• Tourism: Lake Tamouk is a popular natural site; a decline in environmental quality could affect the region's tourist appeal.

1. Avoid Lake Tamouk for now: Do not swim, fish, or consume fish from the lake until further notice.
2. Monitor local alerts: Follow announcements from provincial authorities and media like Cambodianess for updates.
3. Stay hydrated and protect yourself from heat: High temperatures persist; drink plenty of water and avoid going out during the hottest hours.
4. Report any unusual phenomena: If you see more fish deaths or suspicious odors, contact environmental authorities.
5. Adapt your activities: Favor indoor or shaded activities until the heatwave subsides.
6. Stay informed about water quality: If you use well or surface water, have it tested if possible.