Doctors in Florida have formed a new group, Florida Clinicians for Climate Action, to educate people and policymakers about the dangers of a hotter, more humid world and the risks to their most vulnerable patients. The group aims to make sure everyone knows about the impacts of climate change and how to protect themselves, from making sure high school coaches know how to teach their athletes the warning signs of heat exhaustion to explaining the benefit of community cooling centers in low-income neighborhoods to politicians. The doctors say that climate change is already affecting public health, with heat worsening asthma, heart and lung disorders, and even mental illnesses. Rising seas push floodwater polluted by leaky sewage pipes into neighborhoods, and a changing climate helps spread mosquito-borne diseases. The most vulnerable are low-income populations, the elderly, and people of color.