Welcome to the Bureau's online home of the Australian Climate and Weather Extremes Monitoring System. This website provides comprehensive and timely information about climate and weather extremes of temperature and rainfall. Weather and climate extremes can have significant social, environmental and economic costs, with heat waves and floods prime examples. One of the greatest impacts of climate variability and climate change occurs through changes in the frequency and severity of extreme events. This system has been designed to provide a better basis for monitoring such changes, so that we will be better able to understand, prepare for and adapt to future changes in extreme events.