Firefighters were on high alert across the Illawarra as high temperatures and strong winds combined to create the perfect bushfire conditions.Yesterday's cooler winds brought relief following a nervous Saturday, with firefighters watching the weather and on standby to attend incidents.Weekend temperatures peaked on Saturday afternoon in the high 30s in Wollongong and shifting wind direction made for difficult firefighting conditions. Lake Illawarra's Bevans Island was gutted by fire on Saturday, watched by NSW Fire Brigades units who feared embers may jump the water.Residents reported seeing "a nice orange glow" coming from the uninhabited 10-15ha island about 11pm on Friday night. According to firefighters, the blaze was "a lot more smoke than flame" and had all but burned itself out by late afternoon on Saturday."We let it burn out and patrolled the southern shore making sure no embers caught alight," said NSW Fire Brigades supervisor Mark Wunch.Firefighters also went to the scene of two grass fires near Gilba Rd, Koonawarra, yesterday.Volunteers from the Rural Fire Service attended a blaze in Keys Rd, Tongarra, where a business was conducting a minor burn-off in violation of the total fire ban on Saturday.The Bureau of Metrology declared the ban, which came into effect on Saturday about 8am and expired midnight Saturday night. "It wasn't a large incident and fire crews had it contained in a very short space of time," said Inspector Michael Gray.Further south, multiple agencies were working to contain a major bushfire north-west of Dingo Rd in Budawang National Park.NSW Rural Fire Service officer Peter Dyce said firefighters were trying to capitalise on yesterday's cool conditions to contain the blaze. By yesterday the fire had already burned through 1128ha of bushland but was not threatening properties."We are working on getting the fire contained over the next couple of days and hopefully we can get it at a stage where it is considered safe," Mr Dyce said.