Officials at the Environment Agency have blamed the recent heatwave for the deaths of thousands of freshwater fish, across the region.
The intense heat has caused oxygen levels in the water to plunge. There have been reports of fish in distress in Welney in Norfolk and Tiptree in Essex.
The Environment Agency is able to treat affected waterways with River Rover aeration equipment if they are e notified.
More top news
It will stay mild this evening and overnight with clear spells eventually giving way to showers by the morning.
The creepiest kids' costumes from around the region.
A pilot has been arrested at Norwich Airport over concerns about alcohol levels in his body.