The Bureau of Meteorology has revised today's fire danger rating to "severe" as Sydney faces warm and windy weather conditions.
It means that there is now a total fire ban in place across not just Sydney but most of the state's north.
No open fires - including incinerators and barbecues burning wood, charcoal or heat beads - are permitted, and grinding, gas cutting, soldering and welding in the open are also banned.
While Sydney is looking at a top temperature of 29 degrees and Penrith at 31 degrees, strong winds are expected later this afternoon.
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