Almost 2000 Endeavour Energy customers are without power in parts of Wollongong on Wednesday afternoon, as temperatures hover around 30 degrees.
Residents in Gwynneville, Keiraville and West Wollongong have been left in the dark and without airconditioning.
Endeavour Energy says 1917 customers in the 2500 postcode have had their power supply interrupted by the unplanned outage.
Power is expected to be restored by 6.30pm.
At 4.30pm, it was 26.1 degrees in Bellambi and 28.7 degrees at Albion Park.
Humidity remains high – 78 per cent at Bellambi – although a cooler southerly change has arrived in the Illawarra.