Residents are being urged to remain alert as firies continue to battle an out of control bushfire in Wollondilly.
Firefighters are already bracing for tomorrow's forecast of more than 40 degrees in some parts of Sydney, including Macarthur.
Locals in Oakdale, Warragamba, Silverdale, Werombi, The Oaks, Lakesland, Thirlmere, Buxton, Balmoral, Bargo, Hill Top and surrounding townships are being urged to monitor conditions.
Rural Fire Service community liaison officer Elizabeth Ellis said extensive back burning was being conducted today.
"We are pleased that conditions eased enough for us to undertake back-burning on the western side of the fire," she said.
"We are hoping to deepen the containment lines in preparation for tomorrow and effectively block the fire from potentially jumping those lines."
Residents were first warned to make preparations to leave and put their bushfire plan into action last week as the fire had jumped Lake Burragorang.
The NSW RFS has downgraded the fire from Watch and Act to Advice, however Ms Ellis said residents should remain on alert.
"What we need the public to understand is that this fire is not under control," she said.
"There is no guarantee that the containment lines will keep the fire from jumping - it all depends on weather patterns, which can be unpredictable."
Ms Ellis urged locals to stick to their bushfire plan.
"If you need to sort out somewhere to stay in the event that you have to leave, my advice would be to sort it out tonight or early tomorrow morning," she said.
"I would also prepare to stay away for a couple of days if necessary."
There are 250 firefighters on the ground fighting the blaze and working to establish containment lines today.
Firefighting aircraft are also providing aerial support.
Wollondilly mayor Matt Deeth told the Advertiser last week that residents should remain vigilant.
"There is still a risk to the community so I would encourage everyone to keep an eye on the Fires Near Me app and the RFS social media pages," he said.
"We want everyone to have their bushfire plans ready and have the plan in place.
"We have a strong, resilient community who band together in times of need and it is heartening to see them all rallying around each other.
"And our firefighters - they are the frontline for us and we are so proud and thankful for them."
Locals have reached out to residents in the fire zones via social media pages to offer transport for livestock, use of their paddocks or a place to stay the night.
The Oaks Hotel has offered free shelter to residents who have been evacuated.
"If you are being evacuated, come and seek shelter with us at The Oaks Hotel - pets welcome," the hotel's Facebook post read.
The George IV Inn in Picton has also offered refuge to people who have been forced to leave their homes.
Macarthur Mowers and Machinery has also offered help for any locals in fire-affected areas who need work carried out on fire-fighting pumps or generators.
"We will look at them straight away and free," the post read.
"We want to ensure it's starting, running and working for you then and we will do this free of charge to help out.
"Any major repairs required will be done at cost price to help."
The council has also set up its mayoral relief fund for locals to donate money in support of residents affected by the fire season.
Locals can donate to the Mayoral Relief Fund in person, at the Wollondilly Council administration building in Picton, at your local NAB Branch or online at: wollondilly.nsw.gov.au/resident-services/emergencyinformation/2019-fire-event.
MORE TO COME