Parts of Australia's east coast are forecast to have their warmest September day in three to four years tomorrow. A pool of warm air from central Australia will be carried over the nation's east coast on Wednesday by dry and gusty northwesterly winds. This air mass has already caused some inland areas of NSW and Qld to experience their highest September temperature since 2013 this afternoon. As of 2pm, this was the warmest September day in four years for Wilcannia (34C), Broken Hill (31C), Gatton (32C) and Blackall (33C). As this heat spreads east on Wednesday, temperatures are forecast to reach the low thirties in a number of locations along the coastal fringe. Sydney (31C) and Cessnock (34C) are both forecast to climb 11 degrees above average for this time of year. Tomorrow's forecast maximum temperature of 31 degrees in Brisbane and Sydney would make it their warmest September day in four years and three years respectively. Dry inland areas of from central NSW up to central Qld may also experience raised dust tomorrow due to strong winds. Multiple districts in both states are also likely to see elevated fire danger ratings amid the warm, dry and blustery conditions. Cooler southwesterly winds behind a front will drop temperatures by Thursday, with some places cooling by 15 degrees in the space of 24 hours. Visit https://www.rfs.nsw.gov.au/ in NSW and https://www.qfes.qld.gov.au/Pages/default.aspx in Old for the latest information about fires.