The Natural Resources Defense Council, on August 3, introduced its online mapping tool called “Climate Change Threatens Health.” The mapping tool intends to help states and communities establish ways to reduce health risks from climate change. It maps out the average amount of days of low and high water flow and extreme heat from 2000 to 2009, as well as high levels of ozone-related smog from 2002 to 2006. The mapping tool kit also tracks regions that are vulnerable to Dengue fever.