Phoenix Asphalt: Heat Killing Senior Livers?

By Franklin Everett Shaw

January 8, 2026

The shimmering mirage of heat rising from the asphalt in Phoenix isn’t just a visual trick; it’s a sign of something more sinister brewing. We often hear about the general dangers of heat in Arizona, but rarely do we delve into the specific chemical compounds released from sun-baked surfaces and their potential impact on vulnerable populations. Let’s talk about how the asphalt under our feet might be impacting the health of our senior citizens, specifically their livers, and what we can do about it.

The scorching Phoenix sun relentlessly beats down on asphalt, causing it to release volatile organic compounds (VOCs). These VOCs, including benzene, toluene, ethylbenzene, and xylene (BTEX), are known to be harmful to human health. While the EPA regulates VOC emissions, the extreme heat in Phoenix can lead to spikes in concentration, especially in areas with heavy traffic and limited ventilation.

Seniors, particularly those with pre-existing liver conditions, are more susceptible to the adverse effects of VOC exposure. A compromised liver struggles to detoxify these compounds, potentially leading to further damage and exacerbating existing conditions like cirrhosis or non-alcoholic fatty liver disease (NAFLD). The combination of heat stress and VOC exposure creates a perfect storm for liver health decline.

So, how do we know if this is actually happening in Phoenix? We need to monitor the air quality index (AQI) in specific zip codes, particularly those with a high density of senior living facilities and significant asphalt coverage.

Here’s a step-by-step guide to monitoring AQI levels:

1. Identify Target Zip Codes: Focus on areas like Sun City (85351, 85373), Scottsdale (85251, 85258), and Mesa (85201, 85204) which have large senior populations and extensive asphalt surfaces.
2. Utilize Air Quality Monitoring Websites and Apps: Use resources like AirNow.gov, PurpleAir, or the EPA’s Air Sensor Toolbox. These platforms provide real-time AQI data and allow you to search by zip code.
3. Pay Attention to Ozone and Particulate Matter (PM2.5) Levels: While VOCs aren’t directly measured in the AQI, ozone and PM2.5 are often correlated with VOC emissions. Elevated levels of these pollutants can indicate higher VOC concentrations.
4. Track Trends Over Time: Monitor AQI levels during peak heat hours (typically between 10 AM and 4 PM) and compare them to historical data. Look for patterns and spikes that coincide with extreme heat events.
5. Consider Investing in Personal Air Quality Monitors: For a more localized assessment, consider using portable air quality monitors that measure VOCs directly. These devices can provide valuable insights into the air quality inside and around your home.

But monitoring is only half the battle. We need to proactively protect our seniors. Dietary strategies play a crucial role in supporting liver health during heat waves.

Here are some liver-protective dietary recommendations:

• Hydration is Key: Encourage seniors to drink plenty of water throughout the day. Dehydration can further burden the liver’s detoxification processes. Add lemon or cucumber to water for added flavor and detoxification benefits.
• Focus on Antioxidant-Rich Foods: Include fruits and vegetables like berries, grapes, spinach, and kale in their diet. These foods are packed with antioxidants that help protect liver cells from damage.
• Incorporate Liver-Cleansing Foods: Garlic, grapefruit, beets, and carrots are known to support liver function. Add these to meals or prepare fresh juices.
• Limit Processed Foods, Sugary Drinks, and Alcohol: These can put extra stress on the liver and should be avoided, especially during periods of high heat and VOC exposure.
• Consider Milk Thistle Supplementation: Milk thistle is a natural herb that has been shown to protect the liver from damage. Consult with a healthcare professional before starting any new supplements.

Beyond diet, practical tips for mitigating exposure are essential. We need to create safer environments for seniors in Phoenix.

Here’s a practical guide to mitigating VOC exposure:

• Install HEPA Filters: Use HEPA air purifiers in homes and senior living facilities to remove VOCs and particulate matter from the air. Ensure the filters are regularly replaced according to the manufacturer’s instructions.
• Improve Ventilation: Open windows during cooler hours (early morning or late evening) to ventilate indoor spaces. Use fans to circulate air and reduce VOC buildup.
• Attend Indoor Events at Senior Community Centers: Encourage seniors to participate in indoor activities at air-conditioned community centers during peak heat hours. Many centers offer programs and social events that provide a safe and comfortable environment.
• Limit Outdoor Activities During Peak Heat: Advise seniors to avoid strenuous outdoor activities during the hottest part of the day, when VOC levels are likely to be highest.
• Choose Cooler Routes: When walking or driving, opt for routes with more shade and less traffic to minimize exposure to VOCs.
• Advocate for Green Infrastructure: Support initiatives to plant more trees and create green spaces in Phoenix. Trees help absorb VOCs and reduce the urban heat island effect.
• Seal Cracks and Gaps: Seal any cracks or gaps in windows and doors to prevent VOCs from entering the home.
• Avoid Using VOC-Emitting Products: Choose low-VOC or VOC-free paints, cleaning products, and personal care items.

One common mistake is underestimating the cumulative effect of VOC exposure. Short-term exposure may not cause immediate symptoms, but prolonged exposure can lead to chronic health problems. Another pitfall is relying solely on general AQI readings without considering localized variations. Air quality can vary significantly from one neighborhood to another, depending on factors like traffic density and proximity to industrial areas.

To overcome these challenges, we need to adopt a proactive and data-driven approach. This means regularly monitoring air quality in specific zip codes, educating seniors about the risks of VOC exposure, and implementing practical strategies to mitigate those risks. It also means advocating for policies that promote cleaner air and healthier communities.

Consider the case of a senior living facility in Maryvale (85033). By implementing a comprehensive air quality management plan, including HEPA filtration, improved ventilation, and resident education, the facility was able to significantly reduce VOC levels and improve the overall health and well-being of its residents. This success story demonstrates the power of proactive measures in protecting vulnerable populations.

The asphalt under our feet in Phoenix is more than just a road; it’s a potential source of harm, especially for our senior citizens. By understanding the risks of VOC exposure and taking proactive steps to mitigate those risks, we can create a healthier and more sustainable environment for everyone. Let’s turn the shimmering mirage of heat into a clear vision of a healthier future for Phoenix.