we are right still in the middle of this heatwave, so as we head into the christmas period... that is what happens when you wake at 5:30am! so there's very strong evidence — irrefutable evidence, in fact — that the climate of australia has changed, especially over the last 50 or 70 years. i specialise in heatwaves, so i study how heatwaves have changed over time and what's causing those changes. i have a 2—year—old and a 4—year—old daughter. it really bothers me that the world that they're experiencing now is a lot different to my childhood. i've experienced days of 45 and 47 degrees celsius and that was appalling.