SYDNEY (Reuters) – Large parts of Australia on Saturday sweltered under heat wave conditions that prompted the nation’s weather forecaster to issue bush fire warnings in several states. Heat wave alerts were in place for parts of Western Australia, New South Wales, South Australia and the Northern Territory, the Bureau of Meteorology said on its website. The hot weather lifts the risk of bush fires in an already high-risk bush fire season amid an El Nino weather event, which is typically associated with extreme events such as wildfires, cyclones and droughts. In the town of Fitzroy Crossing, i…