Miami-Dade Mayor Daniella Levine Cava announcing new strategies to tackle extreme heat at the UN Climate Change Conference in Glasgow. The mayor joining mayors from Freetown, Athens and Seville discussing the urgency of taking action together. She released the county's climate strategy plan last week with the goal of lessening traffic, using cleaner fuel and creating shadier spaces. Heatwaves cause more deaths than any other climate-driven natural disaster in the U.S, leading to stronger hurricanes, heavier floods, and more sea level rise.