Stage 1
Heat Cramps
- Muscle pain or spasms
- Heavy sweating during activity
- Fatigue, weakness
Do: Move to shade or AC. Sip cool water. Stop activity. Stretch the cramp gently.
Maricopa County · Year-Round
Find heat relief.
Right now.
When Phoenix hits triple digits, knowing where to go can change the day. Cooling centers, hydration stations, and 24/7 respite locations across Maricopa County — plus the signs of heat illness everyone should know.
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Heat Risk
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National Weather Service
KPHX · Phoenix Sky Harbor
KPHX · Phoenix Sky Harbor
The Map
Where to find help.
Year-round cooling centers, summer hydration stations, and 24/7 respite locations across Maricopa County. Data live from the Maricopa Association of Governments.
Source: Maricopa Association of Governments (MAG) Heat Relief Network. Cooling centers operate year-round; hydration stations and 24/7 respite operate seasonally May–September. Open the live map → View Maricopa County Heat Surveillance →
Recognize the Signs
Heat illness moves fast.
Three stages. Each more dangerous than the last. Knowing the signs — and the response — matters.
Stage 2
Heat Exhaustion
- Cool, pale, clammy skin
- Heavy sweating, dizziness
- Nausea, weak or fast pulse
- Headache, fainting
Do: Get to AC. Sip cool water. Apply cool, wet cloths. If symptoms worsen or last over an hour, call 9-1-1.
Stage 3 — Medical Emergency
Heat Stroke
- Body temperature 103°F or higher
- Hot, red, dry skin (no sweat)
- Rapid pulse, confusion
- Loss of consciousness
Call 9-1-1 immediately. Move to a cool place. Apply cool cloths or ice (neck, armpits, groin). Do not give fluids if unconscious or unable to drink safely.
Who is most at risk?
Heat affects some more than others.
In Maricopa County, certain populations face higher risk during extreme heat — and benefit most from a connected response.
Older adults (65+)
Bodies regulate heat less effectively with age, and many common medications worsen the effect.
Outdoor workers
Construction, landscaping, delivery, agriculture. Long sun exposure with limited breaks.
People without housing
Limited shade, AC, and water access. Highest heat-related mortality rate in Maricopa County.
Children under 5
Higher metabolic rate, less ability to communicate distress. Never leave a child in a parked car.
People with chronic conditions
Heart disease, diabetes, kidney disease, mental health conditions. Many medications increase heat sensitivity.
Athletes & outdoor recreation
Runners, hikers, cyclists. Mid-day exertion in 100°F+ heat carries serious risk — even for the well-trained.
Source: Maricopa County Department of Public Health Heat Surveillance
The Network
Phoenix has a system.
The Heat Relief Network connects nonprofits, churches, libraries, and city facilities into a coordinated regional response. Hydrate PHX is part of it.
Cooling Centers
Year-round · Daytime hours
Indoor, air-conditioned spaces — libraries, community centers, senior centers. Free water, restrooms, a place to sit. Open to everyone.
Hydration Stations
May–September · Daytime hours
Free water distributed at churches, nonprofits, transit hubs, and community organizations. Quick refill, no questions asked. Hydrate PHX cartons go here.
24/7 Respite Centers
Around-the-clock · Phoenix area
Indoor rest, AC, water, and restrooms when no other shelter is available. Limited capacity. Call 2-1-1 for current locations and intake details.
Collection Sites
May–September
Locations that accept donated bottled water and fans for redistribution to those most at risk. Want to host one or drop a donation?
Need Help Now?
Right now. Tap to call.
Life-threatening emergency
9-1-1
Heat stroke. Loss of consciousness. Severe symptoms. Call first — cool the person while you wait for help.
Resources · 24/7 · Multilingual
2-1-1
Cooling-center information, shelter, food, utility assistance, transportation. Free service across Arizona.
After-hours respite
602-263-3000
Maricopa County Crisis Response Network. Connects callers to 24/7 respite, behavioral health, and emergency shelter.
If someone is showing signs of heat stroke, call 9-1-1 first. While waiting, move them to a cool place, apply cool cloths or ice to the neck, armpits, and groin, and loosen tight clothing. Do not give fluids to anyone who is unconscious or unable to drink safely.
Learn More
Resources we trust.
Public-health and emergency-management organizations with current, verified guidance on extreme heat.
CDC Extreme Heat
Federal heat-safety guidance, signs, and response protocols.
MCDPH Heat Surveillance
Maricopa County weekly heat-illness and mortality reporting during heat season.
NWS Phoenix
Live forecasts, heat watches, warnings, and advisories from National Weather Service Phoenix.
OSHA Heat Exposure
Federal workplace heat-exposure guidance for workers and employers.
Arizona DHS
State-level heat safety, vulnerable-population resources, and surveillance reporting.
American Red Cross
Heat preparedness guides and household response training.
Help us reach more people.
Hydrate PHX funds free water cartons distributed across the Heat Relief Network and at community events all summer. Sponsors fund production. Volunteers run distribution. The Phoenix community keeps everyone hydrated.