HeatwavesFour ways climate change affects extreme weatherExtreme weather is becoming more frequent and more intense in many places because of climate change.Science & EnvironmentThe silent killer stalking Australia's summerExtreme heat is the nation's deadliest natural hazard, but its impacts aren't being felt equally.AustraliaAre extreme temperatures threatening live music events?The death of a fan at a Taylor Swift concert in Rio during throws up challenges for tour promoters.Latin America & CaribbeanBrazil records its hottest ever temperatureThe town of Araçuaí in the country's southeast hit a high of 44.8C (112.6F) on Sunday.Latin America & CaribbeanBrazil gripped by 'unbearable' heatwaveMore than a hundred million people are thought to have been affected by the extreme weather.Latin America & CaribbeanMalawians warned of extreme heatwaveTemperatures could soar to 44C, the weather bureau says, as it urges people to avoid alcohol.AfricaWarmest September as global temperatures soarThis year is on track to be the warmest on record after September temperatures alarm scientists.Science & EnvironmentWhy heat is a 'silent killer'Heatwaves claim tens of thousands of lives each year. Now a US mapping project is revealing those most at risk so they can get the help they need.FutureHow often should you wash and change your towel?Experts tell us how often you should wash your towel and the risks if you leave it too long.Newsbeat