Experts have been working through the night to try to stop toxic water flooding out of a disused mine near Truro.
Pumps are at full capacity at Wheal Jane, but levels there are still rising following heavy rain. It could mean polluted water leaks into the nearby river and Fal Estuary, a marine special area of conservation. The fire brigade has also been called in to help.
In 1992 flooding from the mine turned the estuary into a polluted swamp.
More top news
Cold out there this morning but plenty of sunshine. Cloud will roll in during the day but it'll stay dry.
Bereaved mum in the Forest of Dean unable to make daily visit to baby daughter's grave because of coronavirus pandemic.
The parcels contain food to last a week, and are being delivered by council workers who'd otherwise be giving out parking tickets.