A gap of knowledge lies within the hazard of extreme heat within the United States and the public’s response and perception of their own vulnerability. Even with constant communication from meteorologist at the National Weather Service and within the broadcast industry, there are still ongoing issues which include the possibility that ambient air temperature from fixed sites do not accurately reflect what the general population is experiencing, that the thresholds for excessive heat warnings are not appropriate, and that the most vulnerable individuals do not have the knowledge, and/or ability to protect themselves when extreme heat does occur. Assessment of the spatial pattens of heat alerts across the United States, mortality risks associated with extreme heat, and days above alert thresholds between 2010 to 2021 will be utilized to exhibit cities and regions where thresholds could be inappropriate and to reveal the most vulnerable between regions within this period.