The Environment Agency says oxygen levels in Grantham Canal have now returned to normal after the deaths of hundreds of fish.
They were first called to the waterway yesterday and found oxygen levels at around 20%. Since then they have been pumping chemicals into the water to increase the oxygen concentration.
Test have now showed that the oxygen has returned to its normal level. It is believed the recent hot weather, leading to an increase in weed growth, had caused the drop.
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Cold with some icy stretches to start. There will be sunny intervals and further blustery, wintry showers.
Early wintry showers will clear to give a mostly dry day with some sunny spells.