A public meeting will take place tonight to discuss the plans for a new £110 million development near St Austell.
The proposed 100-acre site would have a housing and shopping complex.
Some residents are worried that the development would destroy town centre businesses.
They will be able to put forward their views at Cornwall Council's meeting this evening.
More top news
It will be dry and bright in the morning but as the day goes on it will become wet and very windy.
Eastern parts will have heavy rain in the morning, clearing by afternoon.
Fire and Rescue Service says it received a 999 call to say there had been an explosion in a third floor flat within a mid terraced building.