Weather Guidelines
Weather Guidelines
The health and safety of our student-athletes is our priority. Hillcrest High School athletics is governed by the California Interscholastic Federation (CIF) and follows CIF Southern Section guidelines for heat illness prevention and safe participation during extreme weather conditions.
For heat-related decisions, we utilize Wet Bulb Globe Temperature (WBGT) readings through the Perry Weather system. Real-time data from weather stations near our school sites is used to determine when practices or competitions may need to be modified, delayed, or canceled based on current conditions and CIF guidelines.
Air quality conditions are also monitored to help ensure student-athletes can safely participate. Use the live weather information and guidelines below to view current conditions and understand how heat and air quality may impact athletic activities.
Current Hillcrest Weather Conditions
Heat & Air Quality Guidelines
Accessible text versions of the WBGT and Air Quality guidelines are provided below.
WBGT Heat Guidelines
WBGT Region Category 3. Temperatures listed below are calculated using Wet Bulb Globe Temperature and are not basic air temperatures.
| WBGT | Activity Guidelines |
|---|---|
| <82.0°F | Normal Activities – Provide at least three separate rest breaks each hour with a minimum duration of 3 minutes each during the workout. |
| 82.2–86.9°F | Use discretion for intense or prolonged exercise; provide at least three separate rest breaks each hour with a minimum duration of 4 minutes each. |
| 87.1–90.0°F | Maximum outdoor practice: 2 hours. Provide four rest breaks per hour, each at least 4 minutes. Football players wear helmet, shoulder pads, and shorts; full pads allowed if WBGT rises during practice. |
| 90.1–91.9°F | Contests allowed with extra hydration breaks. Maximum outdoor practice: 1 hour. No protective gear or conditioning. Include 20 minutes of rest breaks during practice. |
| ≥92.1°F | No outdoor workouts or contests. Delay practices or competitions until a cooler WBGT is reached. |
Air Quality Guidelines
Air Quality Index (AQI) levels measure particles in the air. Per CIF Bylaw 503.K(2), schools must suspend outdoor practices or competitions when the AQI is 151 or higher, using Perry Weather readings from on-campus monitors.
| AQI | Air Quality Guidance |
|---|---|
| 0–50 | Air quality is satisfactory and poses little or no risk. |
| 51–100 | Sensitive individuals should avoid outdoor activity as they may experience respiratory symptoms. |
| 101–150 | General public and sensitive individuals in particular are at risk to experience irritation and respiratory problems. |
| ≥151 | Increased likelihood of adverse effects and aggravation to the heart and lungs among the general public. No outdoor practices. |