A total fire ban is in place for the Illawarra today ahead of predicted temperatures of up to 34 degrees.
However, the region has also been warned to expect a cold snap this afternoon carrying damaging wind gusts of up to 90km/h.
The NSW Rural Fire Service has put a severe fire danger warning on the Illawarra and ordered the total fire ban for the rest of the day.
The Bureau of Meteorology is predicting a sunny day with temperatures of between 27 degrees (Bowral) and 34 degrees (Nowra and Wollongong).
However, it is also predicting a cold front to move through the region in the afternoon, bringing isolated showers and the chance of thunderstorms in the evening.
A sever weather warning issued for the Illawarra just before 5am this morning said strong northwesterly winds are expected ahead of the cold snap and strong southwesterly winds behind the front.
Winds of up to 50km/h, with gust of up to 90km/h, have been forecast.
Residents are advised to move vehicles under cover or away from trees, secure loose items and keep clear of any fallen power lines.
For emergency help call the SES on 132 500.