Extreme heat remains the deadliest weather-related threat in the American Southwest. However, recent regional strategies are proving that heat-related illness and mortality are entirely preventable through proactive, data-driven, and cross-sector collaboration.
In our latest PowerHour hosted by the Health Insights Hub (sponsored by the Arizona Public Health Association (AZPHA), public health leaders from Maricopa County and Pima County department(s) of health shared how local governments, EMS teams, and non-profits are coordinating to save lives during record-breaking heat seasons.
The Local Reality: What the Data Shows
While extreme heat continues to challenge Southwest communities—evidenced by Phoenix enduring 113 consecutive days at or above 100°F in recent years—coordinated public health interventions are beginning to shift the tide.
Recent health data highlights critical areas of focus:
- Indoor Risks: In Maricopa County, nearly 88% of indoor heat-related deaths occurred in homes with an air conditioning unit present, but 70% of those A/C units were non-functional or turned off due to utility cost concerns.
- Substance Use & Chronic Conditions: Substance use (particularly stimulants) was involved in a majority of heat deaths, as certain medications and substances alter the body’s ability to regulate temperature.
- Impact of Coordinated Relief: Despite record temperatures, public health officials noted a multi-year trend toward declining heat mortality as targeted interventions expanded across the region.
Arizona's Four-Tiered Heat Relief Infrastructure
To address the diverse needs of vulnerable populations, Maricopa and Pima counties structure their heat response into four distinct services:
- Hydration Stations: Quick-access physical locations focused strictly on water distribution and immediate hydration.
- Cooling Centers: Air-conditioned public facilities (such as libraries or community centers) providing short-term indoor relief (up to 2 hours).
- Respite Centers: Enhanced, extended-stay locations (offering 4+ hours of stay) designed for rest, recovery, and deeper service connections.
- Outreach Partners: Field-based teams conducting wellness checks, canvassing neighborhoods, distributing water, and providing Naloxone and heat safety guidance directly to unsheltered individuals.
Breakthrough Innovations & Cross-Sector Partnerships
City of Phoenix EMS Ice Immersion Intervention
One of the most notable emergency innovations discussed was the City of Phoenix’s patented ice immersion bag technique. By surrounding heat stroke patients with ice and water in specialized body bags directly inside ambulances, EMS crews can rapidly drop internal body temperatures to safe levels prior to hospital arrival, significantly lowering mortality rates.
Cross-Sector Alliances
No public health department can handle extreme heat alone. Arizona's model relies heavily on partnerships with:
- Utility Companies (SRP, APS): Coordinating power restoration priorities and funding relief efforts.
- Non-Profits & Community Groups: Entities like the American Red Cross and local faith organizations help staff respite sites and supply essential resources.
- Transportation Providers: Integrating transit vouchers and specialized transport so residents can physically reach cooling hubs.
Overcoming Funding Gaps: The 2-1-1 Transportation Challenge
A major topic of discussion among webinar panelists was the critical challenge posed by the loss of state funding for 2-1-1 (the community referral line). Historically, 2-1-1 served as a central hub for dispatching free rides (via services like Lyft) to cooling centers for residents without private transport.
In response, county health departments are developing localized solutions—such as dedicated heat hotlines and targeted wellness check programs—to bridge the transportation and navigation divide.
Frequently Asked Questions (FAQ)
What is the difference between a cooling center and a respite center?
A cooling center is designed for short-term relief (typically up to 2 hours) where individuals can sit in air conditioning and hydrate. A respite center offers longer-term recovery (at least 4 hours or extended hours) where visitors can rest without interruption, access case management, and receive dedicated support.
How does substance use increase extreme heat risk?
Substance use—especially stimulants—can elevate body temperature, increase heart rate, and impair the body's natural physiological ability to sweat and regulate heat.
What should community members do during extreme heat warnings?
Public health officials recommend three core actions:
- Be a Buddy: Proactively check on vulnerable neighbors, older adults, and those with broken air conditioning units.
- Know the Signs: Recognize heat exhaustion vs. heat stroke (heat stroke is a medical emergency requiring an immediate 911 call).
- Utilize Local Toolkits: Download extreme heat and monsoon preparation guides from local county health department websites.
- Maricopa County: Maricopa County Heat Relief Toolkit
- Pima County: Pima County Cooling Center Toolkit