Sirens which have given residents on Norfolk's coasts and riversides early warning of impending floods for the past 60 years are to be phased out.
Residents will be warned of floods by phone, fax or email
The sirens will be silenced because the Environment Agency is now using email, fax, text and phone messages to keep people informed instead.
Roy Eflett is head of emergency planning at Norfolk County Council.
He said nothing will change until all the people affected know how the new system will work.
A period of consultation is underway and Mr Eflett said: "Between now and July emergency planners, the Environment Agency and police will discuss the changes and the new system with parish councils and other community groups that might be affected.
"We need to present to them the wider implications of what is going to happen before decommissioning the siren system."