The wet bulb temperature of Phoenix still gets very high. Last July, there was an average wet bulb temperature of 73 degrees Fahrenheit. 95 degrees will kill a

The wet bulb temperature of Phoenix still gets very high. Last July, there was an average wet bulb temperature of 73 degrees Fahrenheit. 95 degrees will kill a healthy human, it takes much less to kill a vulnerable person or someone performing manual labor. Climate change is only going to raise that number.