The Sydney Morning Herald | Sydney on alert in baking heat: authorities issue ozone level warning and total fire ban The Sydney Morning Herald Health authorities have warned Sydneysiders to be on alert as the baking sun sends temperatures and ozone levels soaring and triggers a total fire ban. The mercury is expected to tip over 40 degrees in parts of Sydney and ozone levels are predicted to ... Sydney weather: 'Severe' fire danger as mercury nudges the 40s Tomorrow will be bloody hot Total fire ban declared for Sydney and other New South Wales areas tomorrow |