The extreme heat poses significant risks to public health and infrastructure. Heat domes have already caused fatalities and disrupted daily life, including canceled events and damaged rail lines. The upcoming heat dome in the western U.S. is expected to exacerbate wildfire risks and worsen air quality, particularly in regions already affected by smoke from Canadian wildfires. Vulnerable populations, including those with chronic health conditions like heart disease, are at heightened risk. Heat is the deadliest weather condition in the U.S., causing approximately 2,000 deaths annually, according to Yale research. The combination of extreme heat and wildfire smoke is particularly dangerous, as it can strain organ function and increase the risk of respiratory and cardiovascular issues.