The public is being warned a contingency plan is in place to protect them as up to 900 firefighters go on strike.
The walkout in Essex is over proposed cuts, staffing levels and working conditions.
The county's fire and rescue service says more than one hundred firefighters are still working.
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A group of divers have commemorated one century since the end of World War One by hanging a plaque on the bow of a shipwreck off Shoreham.