Heatwave that hit Australia had sparked fire in a national park south of Sydney trapping dozens of tourists on Saturday. Firefighters used boats to rescue around 200 people trapped by the bushfire. The Rural Fire Service had earlier issued an emergency warning to visitors in the Royal National Park as the fire threatened the main access road to a popular tourist spot known as the "Wedding Cake Rock" where people posted pictures of the billowing smoke to social media, Reuters reported. “Beaches may offer safety,” the NSW Rural Fire Service (RFS) stated on FaceBook. Meanwhile, aircraft water-bombers tried to slow the fire. “Firefighters, police, surf lifesavers and National Parks personnel are working with people at beaches in the Royal National Park to help manage their relocation as it’s safe to do so - including by boat and road escort,” The RFS wrote on FaceBook. The park was crowded with tourists. A number of bushfires sparked across the state of New South Wales on Saturday, with temperatures rising above 39C in certain areas. The Bureau of Meteorology issued fire weather warnings as a heatwave advanced across the eastern states.