Febrile Seizures in Arizona: Does the Heat Make Them More Likely?

By Dr. Tamara Zach MD — April 30, 2026

If you've ever rushed your child to the emergency room after watching them shake uncontrollably during a high fever, you already know the sheer terror that febrile seizures can bring. For parents living in the greater Phoenix area, there's an additional worry that comes up again and again in our clinic at Rose Medical Pavilion: does Arizona's extreme heat make febrile seizures more likely? It's a fair and important question — and one that Dr. Tamara Zach MD addresses regularly with families navigating childhood epilepsy and fever-related convulsions in the desert Southwest.

What Are Febrile Seizures?

Febrile seizures are seizures triggered by a rapid rise in body temperature, typically associated with a fever of 100.4°F (38°C) or higher. They most commonly occur in children between the ages of 6 months and 5 years, and they are far more common than most parents realize — affecting approximately 2 to 5 percent of children in the United States.

There are two main types:

• Simple febrile seizures: Last fewer than 15 minutes, occur only once within a 24-hour period, and involve the whole body. These are the most common type and carry no long-term neurological risk for the vast majority of children.
• Complex febrile seizures: Last longer than 15 minutes, occur more than once in 24 hours, or affect only one side of the body. These warrant closer evaluation by a pediatric neurologist.

It's worth emphasizing: having a febrile seizure does not mean your child has epilepsy. Most children outgrow febrile seizures entirely by age 6 with no lasting effects on brain development or cognitive function.

The Arizona Heat Factor: Does It Increase Risk?

This is where living in Phoenix creates a genuinely unique clinical context. Arizona summers routinely push temperatures above 115°F, and heat-related illness in children — including heat exhaustion and heat stroke — can cause dramatic spikes in core body temperature. So the question parents ask is reasonable: can our environment directly trigger a fever seizure in a child?

Heat Illness vs. Infectious Fever

Febrile seizures are classically associated with infectious fever — the kind driven by the immune response to a virus or bacteria. Heat stroke, by contrast, causes hyperthermia through environmental exposure rather than an immune cascade. While the medical literature on heat-stroke-induced seizures in children is separate from classic febrile seizure research, the practical reality is clear: any significant, rapid elevation of a child's core body temperature carries neurological risk.

Dr. Tamara Zach advises Phoenix-area families to treat heat illness in young children with the same urgency as a high infectious fever. If a child has been exposed to extreme heat, appears confused, stops sweating, or has a temperature above 104°F, these are emergency warning signs — not a "wait and see" situation.

How Arizona Summers Compound the Risk

Arizona's climate creates several overlapping risk factors during the summer months that parents should understand:

• Rapid temperature escalation: A car parked in Phoenix summer sun can reach 160°F inside within minutes. A child left in a vehicle — even briefly — faces catastrophic hyperthermia.
• Dehydration: Children dehydrate faster in dry desert heat, and dehydration lowers the threshold at which the body can regulate temperature. This can accelerate fever spikes during even mild illnesses.
• Year-round viral circulation: Arizona's warm winters mean respiratory viruses circulate almost year-round. Children can experience fever-producing illness in the middle of a 110°F summer, compounding both heat stress and infectious fever simultaneously.
• Outdoor activity exposure: Kids playing outside in peak summer heat are at elevated risk for heat-related illness, particularly during monsoon season when humidity rises and the body's natural cooling through sweating becomes less effective.

What to Do If Your Child Has a Febrile Seizure in Arizona

During the Seizure

1. Stay calm and stay with your child.
2. Place them on their side (recovery position) on a soft, flat surface to prevent choking.
3. Do not put anything in their mouth — children cannot swallow their tongues.
4. Do not restrain their movements.
5. Time the seizure with your phone if possible.
6. Call 911 if the seizure lasts more than 5 minutes, if your child does not regain consciousness, or if you are unsure whether this is heat stroke rather than infectious fever.

After the Seizure

Most children are briefly confused or sleepy after a febrile seizure — this is normal and called the postictal period. Seek emergency care regardless of how quickly your child appears to recover. In Arizona summers, if there is any possibility that heat exposure contributed to your child's temperature, cooling measures (moving to air conditioning, cool compresses, hydration if conscious) should begin immediately while awaiting emergency services.

When Should You See a Pediatric Neurologist?

Not every first febrile seizure requires an immediate neurology referral, but Dr. Tamara Zach recommends scheduling a consultation with a pediatric seizures specialist in the following situations:

• Your child's febrile seizure lasted longer than 5–10 minutes
• Your child had more than one seizure within the same illness episode
• Only one side of the body was affected
• Your child is under 12 months or over 5 years of age
• There is a family history of epilepsy or unprovoked seizures
• Your child's development seems to have changed after the event
• You simply need clarity and peace of mind

Pediatric neurology evaluation may include an EEG, neuroimaging, or blood work depending on the circumstances. These are tools to help Dr. Zach and her team build the clearest possible picture of your child's neurological health — not cause for alarm on their own.

Arizona Resources for Families

Families in Arizona have access to meaningful support systems worth knowing about. AHCCCS (Arizona Health Care Cost Containment System), the state's Medicaid program, covers pediatric neurology visits and diagnostic testing for eligible families. If your child has experienced a complex febrile seizure and shows signs of developmental delay, the Arizona Early Intervention Program (AzEIP) can coordinate developmental support services for children under age 3 at no cost to qualifying families.

Schedule a Consultation at Rose Medical Pavilion

Watching your child have a seizure is one of the most frightening experiences a parent can face — and in Arizona's climate, the questions around heat, hydration, and fever can add an extra layer of worry. Dr. Tamara Zach MD and the team at Rose Medical Pavilion in Phoenix are here to give your family clear answers, expert evaluation, and a compassionate care plan tailored to your child's specific needs.

If your child has experienced a febrile seizure — simple or complex — or if you have ongoing concerns about fever-related neurological symptoms, we encourage you to reach out and schedule a consultation. You deserve a specialist who takes your child's brain health as seriously as you do.