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.
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Women who are part of a running group are delivering medicine to elderly residents, by running their prescriptions to their doors.
Dave Lewins said he had to listen to doctors explain to fellow patients that they may not make it through the night.