25/08/2026
⛈️ Thunderstorms and fisheries – be prepared
The Met Office has issued yellow warnings for thunderstorms across parts of our catchment in the coming days.
Following the recent warm weather, these conditions have the potential to cause significant drops in dissolved oxygen (DO), which can quickly lead to fish becoming distressed.
If your fishery currently has a significant algal bloom or is particularly shallow, it’s important to keep a close eye on conditions. Where possible, visit your fishery, regularly monitor dissolved oxygen levels and make sure any aeration equipment is ready to use.
Look out for signs of low oxygen, including:
• Fish gasping at the surface
• Fish becoming lethargic or gathering around inflows
• A sudden change in the colour or clarity of the water, which may indicate an algal dieback
The highest risk is often overnight and around dawn, when oxygen levels are naturally at their lowest.
If you record low dissolved oxygen levels or see fish in distress, please report it to the Environment Agency Incident Hotline on 0800 80 70 60 as soon as possible.
The earlier a problem is identified, the greater the chance of taking action before significant fish losses occur.