The fire service worked through the night to assist with the pumping of toxic water from a disused mine near Truro.
Pumps are currently at full capacity at Wheal Jane. Levels are still rising, but at a slower rate than yesterday.
There are fears that rising levels could pollute the nearby river and Fal Estuary, a marine special area of conservation, although there has been no pollution so far.
More top news
A man has been helped to safety by a neighbour after his home set on fire without him realising. Nigel Slark's house is now badly damaged.
A murky but mild start to the week which quickly turns dry and cold over the next few days with brisk winds.
A dull and damp start to the week turns drier but colder as the week goes on. Temperatures just about getting into double figures on Monday.