Climate change factor in record hot days with more to come, says Climate Commission AUSTRALIA'S record-breaking summer heatwave was made worse by climate change, the Climate Commission says. And people should brace for more, and harsher, hot spells. The Federal Government-funded commission will release a report today called The Angry Summer, which also warns of increasing flood risks. The report says warmer and more moist conditions have caused weather patterns to change, and while Australia has always experienced extreme weather events, they were hitting harder and more often. "It is virtually certain that extreme hot weather will continue to become even more frequent and severe around the globe, including Australia, over the coming decades," it says. It is also likely that the frequency of heavy rainfall will increase over many areas of the globe. The 12-page report, by the body set up to provide independent advice on the science of climate change, points to a record-breaking stretch of seven days in January when daily temperatures across the country averaged above 39C. "Climate change has made the extreme heat conditions worse, with the length, extent and severity of the January heatwave unprecedented since records began," it says. All of the extreme weather events of the Angry Summer occurred in a climate system that contains vastly more heat compared to 50 years ago. The report's author, commissioner Professor Will Steffen, says renewable energy sources must be increased to combat greenhouse-gas emissions. He said extreme weather had occurred throughout our history, but there were changes to the patterns of extremes.