After battling fires for 22 days, Shoalhaven Rural Fire Service crews faced two new outbreaks yesterday that were believed to have been deliberately lit.Shoalhaven RFS Superintendent Ian Stewart said two suspicious fires had broken out at Higgins Creek and Nowra detectives were investigating. The suspicious fires had ripped through 200ha of bushland but were of no immediate threat to property or people, Mr Stewart said.RFS crews from Sydney, Queanbeyan and the Eurobodalla arrived in the Shoalhaven yesterday to relieve the 150 volunteers who had been battling fires in the region since mid-August. In Romney Park, firefighters took advantage of more favourable weather conditions and continued backburning operations to the west of the fire in Woodburn Rd to strengthen and consolidate containment lines.Motorists and residents were advised to avoid Monkey Mountain Rd, Woodburn Rd and Old Coach Rd due to hazardous driving conditions.The Princes Hwy was reopened yesterday but if conditions deteriorate the road may be closed at short notice. Crews were also watching fires at Termeil Creek and Burrier.In all areas, there were no direct threats to property but the RFS advised residents to keep their windows and doors closed as the smoke that was blanketing the region posed health risks.Residents were also advised to be prepared in case of any increase in fire activity, spot fires, smoke and embers.A bushfire emergency has been declared for the Shoalhaven. Residents needing more information should telephone 1800 679 737. Any fire without a fire truck in attendance or any request for urgent assistance should be reported to triple-0 immediately.