We're less than two weeks into the Australian summer, but already it feels like it's been a lot longer than that.

All anyone can talk about right now is the bushfire crisis and the air quality.

Since the fire season began, six people have died, more than 1000 homes have been destroyed, and  about 10% of the national parks have burnt down.

Today, what does the data say about the exact difference between summers now, the summers our parents lived through, and the next 20 to come?