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 damp and cold night ahead. Valentine's Day will start cloudy but become brighter in the afternoon. Risk of showers along the Kent coast.
Cold and damp tonight with outbreaks of rain. A cold and dull start to Valentine's Day but becoming drier and brighter by the afternoon.
Rain turning more patchy this afternoon but more persistent along the coast. Feeling cold in the brisk north-easterly wind.