This article is cross-posted on Desert Heat Consulting for its relevance to school administrators and athletic departments.

Heat Safety in School Athletics: A Q&A for Athletic Directors and Coaches

Exertional heat illness is one of the leading causes of death in high school athletes, and almost every fatal case is preventable. Football preseason in August gets the headlines, but the risk extends across sports, seasons, and age groups. This Q&A covers what schools should understand about protecting student athletes from heat.

Q: How serious is the risk, really?

Serious enough that exertional heat stroke is one of the top three causes of sudden death in high school athletics, alongside cardiac events and head injuries. The death toll varies year to year, but a typical year sees multiple confirmed exertional heat stroke fatalities in U.S. high school sports, plus a much larger number of hospitalizations and near-misses.

The pattern is consistent: most deaths happen in the first few days of preseason practice, in football, in unacclimatized athletes, often in athletes carrying additional risk factors (overweight, sickle cell trait, recent illness, certain medications). These aren't random tragedies. They follow a predictable profile.

Q: Why are the first few days of preseason so dangerous?

Because acclimatization hasn't happened yet. Heat acclimatization is the physiological adaptation that lets the body handle heat stress (plasma volume expansion, more efficient sweating, better cardiovascular response, lower core temperature at fixed workloads). It takes 7 to 14 days of progressive heat exposure to develop, and athletes who go from a sedentary summer into full-contact August practice in pads have none of it.

The body that shows up to Day 1 of preseason is meaningfully different from the body that shows up to Day 14, even with no other training change. Practices that are tolerable in week three can be lethal in week one.

Q: What's the standard heat acclimatization protocol for preseason?

The National Athletic Trainers' Association (NATA) guidelines, which are widely adopted but not universally enforced, recommend a 14-day progressive acclimatization period:

Days 1 to 2: No equipment except helmets. Single practice per day, maximum 3 hours, 1-hour walk-through allowed but separated by at least 3 hours of rest.
Days 3 to 5: Helmets and shoulder pads only. Single practice per day, maximum 3 hours.
Days 6 to 14: Full equipment. Two-a-day practices permitted, but only every other day, with specific rest and total practice time limits.

The principle: start light, progress gradually, give the body time to adapt before adding equipment load and practice volume. Schools that follow this protocol see substantially lower heat illness rates than schools that don't.

Q: Are these guidelines required?

It depends on your state and your athletic association. Some state high school associations have adopted mandatory heat acclimatization rules. Others have recommendations without enforcement. A few have nothing specific. Where rules exist, they're often modeled on NATA guidelines but with local variations.

The compliance posture I'd recommend: follow NATA guidelines regardless of what your state requires, document your adherence, and treat the guidelines as a floor rather than a ceiling.

Q: What's WBGT and why does it matter for school sports?

Wet Bulb Globe Temperature is a composite measure of heat stress that integrates air temperature, humidity, wind, and solar radiation into a single metric. It's substantially more useful than air temperature alone because two days with the same air temperature can produce wildly different physiological stress depending on humidity and sun.

NATA, ACSM, and most sports medicine organizations recommend using WBGT to determine practice modifications. Specific thresholds: at moderate WBGT, modify practices with extra rest breaks. At high WBGT, restrict equipment and limit duration. At extreme WBGT, postpone or cancel.

A handheld WBGT meter is relatively inexpensive and is the single best equipment investment a school athletic department can make for heat safety. Air temperature from a weather app is not a substitute.

Q: Which sports are highest risk?

Football is the headline sport because of the equipment load (pads and helmet add insulation and impede heat dissipation), the timing (August preseason in heat), and the body composition of many football players. But every sport with summer or early-fall practices is at risk: cross country, soccer, marching band (often overlooked but doing prolonged outdoor activity in equipment), field hockey, lacrosse, and even golf in extreme conditions.

The risk isn't limited to large athletes in pads. It extends to any athlete doing prolonged exertion in heat without acclimatization.

Q: What individual factors elevate a student's risk?

Several:

Lack of acclimatization (returning from a sedentary summer)
Recent illness, especially viral illness with fever
Inadequate sleep the night before practice
Dehydration at the start of practice
Larger body size and higher BMI
Sickle cell trait (increases risk of exertional collapse)
Certain medications (stimulants for ADHD, some psychiatric medications)
History of previous heat illness

A student with multiple risk factors needs individualized monitoring, not just inclusion in the standard team protocol.

Q: What does an effective school heat illness prevention program include?

Six elements:

A written policy based on current guidelines, reviewed annually.
WBGT monitoring at the practice site, not from a distant weather station.
Mandatory acclimatization protocols that can't be skipped for competitive convenience.
Hydration access and scheduled breaks appropriate to conditions.
Cold water immersion capability on site (a 100-gallon stock tank with ice and water is the gold standard for treating exertional heat stroke and is dramatically more effective than ice packs alone).
Trained personnel who can recognize heat illness and execute the cooling response immediately.

The presence of a certified athletic trainer at practices is the single strongest protective factor in the research. Schools without ATs see substantially worse outcomes.

Q: What's the most critical response if a student goes down with suspected heat stroke?

Cool first, transport second. The treatment principle for exertional heat stroke is "cool first, transport second" because the duration of time spent above the critical temperature threshold (around 104°F core) determines outcome. Immediate cold water immersion in a stock tank reduces core temperature dramatically faster than waiting for EMS, and the survival data is stark: athletes cooled aggressively on site have survival rates approaching 100%, while athletes transported uncooled have substantially worse outcomes.

This is one of the few situations in emergency medicine where the right move is to delay transport in favor of immediate treatment. Coaches and ATs should know this, and the equipment to execute it should be on site at every practice during heat-risk months.

Q: What's the most common gap in school heat programs?

Two: WBGT monitoring not happening at the actual practice site, and cold water immersion equipment either absent or stored where it can't be deployed in the critical first minutes. Schools often have a written policy that satisfies the paperwork requirement but lack the operational pieces that actually save lives.

The short version: Exertional heat illness in school athletics is highly preventable with current best practices: progressive acclimatization, WBGT-based practice modification, on-site cold water immersion capability, trained personnel, and individualized risk monitoring. The science is clear and the protocols exist. The deaths that still happen are almost always failures of implementation, not failures of knowledge.

Desert Heat Consulting helps school districts and athletic programs develop and audit heat illness prevention programs aligned with current best practices. [Schedule a consultation.]