Discover Cities Where Americans Face the Most Extreme Heat Risk

In recent years, the United States has witnessed an alarming rise in the intensity and duration of heatwaves, primarily due to climate change. This increase in extreme heat poses significant risks to many American cities, especially impacting vulnerable populations, and leading to high energy costs. This article provides an in-depth analysis of the cities where Americans face the most extreme heat risk, examining various factors contributing to these risks and potential strategies for mitigation and adaptation.

Most At-Risk Cities

  1. Phoenix, Arizona: Phoenix experienced a brutal heatwave in July 2023 with 31 consecutive days of high temperatures of at least 110 degrees Fahrenheit, prompting a state of emergency​​.
  2. Las Vegas and Tucson, Arizona; Dallas and Houston, Texas: These cities, located in the nation’s Sun Belt, face more than 76 days with temperatures over 90 degrees each year​​.
  3. Kansas City, Missouri and Richmond, Virginia: Even cities farther north like Kansas City and Richmond are managing more extreme heat, indicating that this is not just an issue confined to traditionally hotter areas​​.
  4. Tulsa, Oklahoma: Tulsa is identified as a city that would respond well to adaptation strategies like planting street trees and installing cool roofs to manage heat​​.
  5. Denver, Colorado: Denver benefits more from strategies aimed at reducing greenhouse gas emissions​​.
  6. New York, Boston, and Chicago: These Northeastern and Midwestern cities are shown to gain the most from simultaneously implementing adaptation and mitigation measures​​.
  7. Los Angeles and Miami: In contrast, Sun Belt cities like Los Angeles and Miami face more limited reductions in heat exposure even with these measures​​.

Vulnerable Populations and Economic Strain

  • Approximately 23 million residents in U.S. metropolitan areas live in neighborhoods that experience intense heat, face high energy costs, and house vulnerable residents least able to cope with these impacts​​.
  • Almost 9 million residents under 5 or over 60, living in poverty, are found across all metro areas nationally​​.
  • Residents in the lowest income brackets are disproportionately affected, struggling with high “energy burdens” due to rising energy costs​​.

Mitigation and Adaptation Strategies

  • Heat Adaptation: Strategies like implementing cool roofs and planting street trees are essential to lessen heat exposure in major U.S. cities​​.
  • Mitigation Strategies: Focusing on reducing greenhouse gas emissions is crucial, especially in cities like Denver where this approach is more beneficial​​.

Policy Implications and Future Directions

  • Policymakers are urged to grow programs like the Low Income Home Energy Assistance Program (LIHEAP) to help vulnerable households offset energy costs​​.
  • Improvement in buildings’ physical conditions and modernization of regulatory codes can help mitigate heat risks​​.
  • Rethinking community planning and building strategies is vital to protect residents and businesses in neighborhoods facing extreme heat. This includes increasing tree cover and using materials that reflect rather than absorb heat​​.

Safety Tips

The threat of extreme heat waves is a growing concern in many U.S. cities. In addition to identifying the cities most at risk, it’s crucial to understand the best practices for staying safe during these heat events. Here are some essential safety tips to consider:

Hydration and Diet

  1. Stay Hydrated: Drink about 3/4 of a gallon of water daily to prevent heat illness. Avoid sugary, caffeinated, and alcoholic drinks​​.
  2. Salt and Mineral Replacement: If sweating a lot, use snacks or sports drinks to replenish lost salt and minerals​​.

Emergency Preparedness

  1. Emergency Kits: Prepare a Go-Kit and a Stay-at-Home Kit with food, water, and medicine. Ensure you have a one-month supply of medications and keep personal, financial, and medical records accessible​​.
  2. Power Outage Preparation: Plan for the possibility of power outages, which may limit access to clean drinking water and air conditioning​​.

Cooling Strategies

  1. Air Conditioning: Spend time in air-conditioned spaces as much as possible. If you don’t have air conditioning, find public places that do, like libraries or shopping malls​​.
  2. Cooling Methods: Use cool showers or baths and wear lightweight, loose clothing to keep cool​​.

Outdoor Activities and Clothing

  1. Limit Outdoor Activities: Reduce outdoor activities, especially during the hottest parts of the day. If you must be outdoors, try to do so earlier or later in the day when it’s cooler​​.
  2. Appropriate Clothing: Wear light-colored, loose, and lightweight clothing to help stay cool​​.

Vulnerable Populations

  1. Check on Others: Regularly check on friends, family, and neighbors, especially those who are more vulnerable to heat illness, such as older adults, infants, and people with medical conditions​​.
  2. Community Support: Create a support network to assist and check on each other during extreme heat events​​.

Recognizing and Responding to Heat-Related Illnesses

  1. Heat Cramps: Characterized by heavy sweating with muscle pain or spasms. Move to a cool place and drink water or a sports drink​​.
  2. Heat Exhaustion: Symptoms include heavy sweating, cold and clammy skin, and dizziness. Move to a cooler place, loosen clothing, and cool the body with wet cloths or a cool bath​​.
  3. Heat Stroke: A severe condition with symptoms like high body temperature and fast pulse. Call 911 immediately and move the person to a cool place​​.

Mental and Emotional Well-being

  1. Stress Management: Recognize that it’s normal to feel stressed or anxious during extreme heat events. Eat healthy food and get enough sleep to manage stress​​.
  2. Seek Help if Needed: Don’t hesitate to contact helplines like the Disaster Distress Helpline (1-800-985-5990) for support​​.


The changing climate has led to a significant increase in the frequency and severity of heatwaves across the United States. This poses a considerable risk, especially to vulnerable populations in urban areas. To combat this growing threat, a combination of adaptation and mitigation strategies tailored to specific urban environments is essential. Policymakers and city planners must prioritize these strategies to enhance the livability and safety of our cities in the face of ever-increasing temperatures.