Contingency plans are being put in place across the Anglia region as firefighters prepare to take part in a four hour nationwide strike.
It's in a row over pension plans.
Emergency calls will still be answered but there may be no response between 12pm and 4pm to calls about things like gas leaks and flooding.
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Morning's likely to see plenty of cloud bringing some mainly light and patchy rain.
Any showers should die away this evening with most places dry overnight.
The veteran rockers Status Quo have been forced to postpone a concert in Norwich this weekend after frontman Francis Rossi became ill