Texas high schools are staring down another blistering preseason, but this time the ground rules are changing in a big way. A statewide heat-safety mandate is set to rewrite how coaches handle outdoor workouts and marching-band rehearsals, with Wet Bulb Globe Temperature monitoring shifting from a nice-to-have to a non-negotiable requirement starting Aug. 1, 2026.
The UIL Legislative Council voted on June 10 to convert its Heat Stress and Athletic Participation Guidelines from recommendations into mandatory policy for all member schools, with an Aug. 1, 2026 implementation date ahead of the 2026-27 school year, according to the University Interscholastic League. The mandate will govern outdoor athletics and marching-band activities statewide and follows two years in which schools were only urged, not required, to use WBGT readings. The University Interscholastic League also notes that the rules still need approval from the Texas Commissioner of Education before they officially take effect.
What The WBGT Rules Require
Under the new system, WBGT numbers will dictate exactly how hard teams can go. In the “yellow” range, coaches have to build in at least three separate rest breaks lasting four minutes and have rapid-cooling equipment ready on-site, according to the Houston Chronicle. Hit the “orange” band and practice time is capped at two hours, while football players are limited to helmets, shoulder pads and shorts. At the “red” level, practices cannot exceed one hour, there is no protective equipment allowed and no conditioning drills, and anything above the “black” cutoff stops outdoor workouts completely, the Houston Chronicle reports. The risk these thresholds are trying to manage is very real: the National Federation of State High School Associations estimates about 9,000 high-school athletes each year deal with heat-related illness, and that football averages roughly 2.4 heat-related deaths annually, according to NFHS.
A survey of head coaches conducted by the Chronicle found plenty of skepticism on the sidelines: 76.7% of respondents said they view the WBGT requirements as too restrictive, even though 81.4% reported that heat guidelines have already changed how they run practices, the Houston Chronicle reports. UIL athletics director Ray Zepeda told the outlet that “our coaches, athletic trainers and athletic administrators have done an unbelievable job of taking care of kids” and that the UIL medical advisory committee believed schools were ready to shift from recommendations to firm rules. Coaches also told the Chronicle that WBGT readings can vary from one block to the next, making things tricky when neighboring campuses are staring at different numbers on their thermometers.
Costs, Facilities And Real-World Risks
Complying with the mandate is not as simple as checking a weather app. Handheld WBGT devices and specialized forecasting services can run hundreds of dollars, and creating rapid-cooling or cold-water immersion stations means buying equipment and training staff, according to PerryWeather. Some better-resourced districts are trying to beat the heat by heading indoors: Galena Park ISD’s 117,000-square-foot North Shore multi-use indoor practice facility is one recent example of that trend, per Spaces4Learning. The urgency behind the rules is not abstract. Last year, Lancaster High School athlete Preston Malone experienced a medical emergency during practice and later died, a tragedy that local outlets covered and that has helped fuel the push for tighter protections, according to reporting by the Dallas Morning News.
How Schools Should Prepare
UIL implementation guidance spells out the routine that will soon be standard on practice fields. Schools must rely on a scientifically approved WBGT device or an internet-based WBGT forecast, set up on-site instruments 30 minutes before practice begins, take a reading within 15 minutes of the start and check again every 30 minutes, according to the University Interscholastic League. Emergency-action plans have to include on-site rapid cooling, and the guidance recommends keeping written WBGT logs and having a trained rescuer ready for cold-water immersion. Districts that cannot immediately purchase equipment are allowed to lean on online WBGT forecasts, but the UIL says on-site measurements should be a priority for accuracy. Coaches and athletic trainers are being urged to treat WBGT readings as hard limits rather than suggestions, particularly for athletes still getting acclimated to the heat.
Some districts say they are already ahead of the curve. Midland ISD told local media that it has been using WBGT monitoring for the last two years and is folding the UIL-required steps into its planning for the fall, according to the Midland Reporter-Telegram. With August two-a-days and band rehearsals right around the corner, athletic departments across Texas will be watched closely to see whether these tougher rules actually cut down on heat-related illnesses while still fitting within cramped practice schedules and uneven district resources.
