Environment Agency staff have spent the day dealing with an emergency at a canal in Grantham after hundreds of dead fish were discovered this morning.
It's thought they died through lack of oxygen caused by the hot weather.
Chemicals have now been added to the water to bring the oxygen levels back to normal.
More top news
When you meet Malala Yousafzai it is hard to imagine such a shy, softly spoken girl addressing world leaders in the spotlight.
Nobel prize-winner and campaigner Malala Yousafzai speaks to ITV News about her political ambitions and her new Birmingham accent.
It'll be a dry night with largely clear skies developing. Tomorrow, feeling pleasantly warm in the sunshine with light winds.