Javier Torres | Afp | Getty ImagesA quiet revolution is underway to address a widely underestimated climate challenge: extreme heat. Myrivili said she believes that extreme heat is often overlooked because it lacks the visible drama of roofs being ripped from homes or streets being turned into rivers. Most people wouldn't know that in Australia, extreme heat kills more people than bushfires and floods and storms. Tiffany Crawford Co-chief heat officer of Melbourne, AustraliaThe CDC defines extreme heat as summertime temperatures that are significantly hotter and/or more humid than average. Melbourne, AustraliaTiffany Crawford, co-CHO of Melbourne, told CNBC that extreme heat kills more people in Australia than bushfires, floods and storms.

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Persons: Javier Torres, Eleni Myrivili, CHO, Myrivili, Tiffany Crawford Co, Jane Gilbert, We've, Gilbert, Giorgio Viera, Afreen, Dhaka North's CHO, Bushra, Australia Tiffany Crawford, Crawford, Krista Milne, Diego Fedele Organizations: Afp, Getty, CNBC, Centers for Disease Control, CDC, Dade, Dhaka North, Dhaka North's, Nurphoto, Environmental, Station Locations: Quilpue comune, Valparaiso region, Chile, Athens, U.S, Australia, Melbourne, Miami, Miami , Florida, Dhaka, Bangladesh, Australian