If you get the message on your phone, consider leaving bush fire prone areas (like thick bushland or open paddocks) tonight or first thing in the morning.
Consider relocating to a safer location during the hottest and driest part of the day such as a major town that is well away from bushland or open paddocks.
Avoid travelling during the worst of the conditions. If you need to travel, use main roads and highways. Avoid backroads or tracks wherever possible.
Don't call 000 unless it's report a fire emergency.
You can find out more at http://www.rfs.nsw.gov.au/news-and-media/general-news/dangerous-fire-conditions-across-nsw