Cleveland Fire Brigade is among the services that are training volunteers in case planned strike action goes ahead.
Fire Brigade Union (FBU) members have voted to take action within the next month in a row with the Government over proposals to review the current pension scheme. If the strike happens, it would be the first time fire services have taken nationwide industrial action for more than a decade.
Cleveland is one of the services that is training auxiliary firefighters to provide cover for officers that go on strike.
Ian Hayton, Chief Fire Officer at Cleveland Fire Brigade, said: "Because here 95% of the operational workforce are in the FBU, I've got to expect they will all follow the strike call and not be available for duty.
"Consequently I went out a month ago into the community and asked for volunteers to be trained as auxiliary firefighters for defensive training."
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