Heat and PSD
Heat-Related Early Release/Closure Protocol Update
PSD, in partnership with the Larimer County Department of Health and Environment (LCDHE) and members of our teaching, classified, and administrative staff, has developed a protocol for determining when to dismiss students early or not have school on days when high temperatures may impact our students and the staff who support them. This protocol will determine whether to implement a two-hour early release or full heat closure for students in kindergarten through eighth grade and students who attend school in unairconditioned buildings, including Centennial High School, Polaris Expeditionary Learning School, and Poudre Community Academy (PCA).
All four comprehensive high schools, Timnath Middle School High School, Wellington Middle School High School, Poudre Global Academy, and all Transitions Programs will remain in session because these buildings are air conditioned. The Mountain Schools (Livermore, Red Feather, and Stove Prairie) will remain in session and will be monitored for high temperatures.
Heat-related decisions informed by monitoring data sources
Decisions to call for a heat-related two-hour early release or closure will be informed by close monitoring of two data sources:
- U.S. Centers for Disease Control and Prevention’s Heat & Health Tracker for Larimer County, which is based on the NWS HeatRisk Index
- National Weather Service forecast for zip code 80521
Conditions for Early Release or School Closure
If one or more of the following conditions are met, the district will consider calling a two-hour early release or full school closure:
- The U.S. Centers for Disease Control and Prevention’s Heat & Health Tracker for Larimer County indicates major or extreme levels of risk of heat-related impacts to individuals. The NWS HeatRisk Index defines major and extreme levels of risk using a color-coded system. Red indicates major risks associated with heat, and magenta indicates extreme risks associated with heat.
- HeatRisk Index for Larimer County is Red (3) or Magenta (4) level
- National Weather Service forecasted highs of 95°F or above for zip code 80525
- National Weather Service forecasted highs of 90°F+ for three consecutive days, including weekends for zip code 80525
Whenever possible, PSD will notify families and staff of a possible early release or closure 12-24 hours in advance of the closure or early release.
Schools impacted by heat-related two-hour early release/closure
- All Early Childhood, Elementary, and Middle Schools
- Centennial High School
- Polaris Expeditionary Learning School
- Poudre Community Academy
- What does a two-hour early release due to heat mean for students in grades K-8 at impacted schools and students at Centennial, PCA, Polaris, and in Early Childhood?
- What happens with AlphaBEST on early release or heat-related closure days?
- What does a full day closure due to heat mean for students in grades K-8 at impacted schools and students at Centennial, PCA, and Polaris?
- Why don't you start later in the year to avoid the heat?
- Why don’t all PSD schools have AC by now, since the Mill Levy was passed to address this?
What does a two-hour early release due to heat mean for students in grades K-8 at impacted schools and students at Centennial, PCA, Polaris, and in Early Childhood?
What happens with AlphaBEST on early release or heat-related closure days?
What does a full day closure due to heat mean for students in grades K-8 at impacted schools and students at Centennial, PCA, and Polaris?
Why don't you start later in the year to avoid the heat?
Why don’t all PSD schools have AC by now, since the Mill Levy was passed to address this?
Schools remaining in session during heat-related early release/closure
- Fort Collins, Fossil Ridge, Poudre, and Rocky Mountain High Schools
- Timnath and Wellington Middle-High Schools (Grades 6–12)
- Poudre Global Academy
- Career Tech Center
- Transitions programs
- Mountain schools (Livermore, Red Feather, Stove Prairie) — these will be monitored but will remain in session unless otherwise noted.
- What does a two-hour early release or full-day closure due to heat mean for students who attend FCHS, FRHS, PHS, RMHS, TMHS, WMHS, PGA, and the Transitions Programs?
- Why is PSD considering early release or heat-related closures for some schools but not others?
- Why do heat days apply so some schools that DO have AC?
What does a two-hour early release or full-day closure due to heat mean for students who attend FCHS, FRHS, PHS, RMHS, TMHS, WMHS, PGA, and the Transitions Programs?
Why is PSD considering early release or heat-related closures for some schools but not others?
Why do heat days apply so some schools that DO have AC?
Heat Resistant Practices at PSD
Carpentry
- Film
- Tinted film has been added at several locations such as Preston Middle School's east facing main hall bridges, Fort Collins High School's south facing windows, and the monitor glass at the Delaney sites.
- In some cases reflective film on windows was requested and denied as it affects the thermal pane balance (the operation of the window).
- Shades/blinds
- Added in the east hall windows at Preston.
- Installation of a 1% shade material instead of district standard 3% in two south facing classrooms at Webber Middle School to reduce heat passage.
- Other blinds-related solutions were done in classrooms in several schools.
Construction
- Past strategies
- Utilizing outside air and flushing the building with large fans and/or BAS manipulation. The “hottest” schools are the 1960-1990 builds in which the exterior building thermal envelope is typically constructed with non-insulated masonry walls with single panel windows
- Most HVAC renovations in the older schools included glazing replacement with insulated window units (Lesher and Putnam Middle Schools, Barton Early Childhood Center, Dunn Elementary School). Window film was explored but it did not provide much relief. In the “Delaney models.” reflective tinting was added to the monitors.
Building Automation
- Run HVAC at full outside fresh air intake in buildings from 1 to 3 a.m. to bring in cool night air
- Change room set points to allow the room to sub cool (avoiding the mixing of warmer air with cooler air from the dampers)
- Use morning cool down modes (continuing to bring in cooler air as long as the temps support it)
- Turn certain equipment off during the heat of the day (gym air ex.) equipment that has zero cooling impact but could accidentally cause warm air to be drawn into the building.
- Shutting the system off has always been the best – stale cool air vs warmer moving air, in terms of the temperature. This allows occupants to move air with stationary fans.
Custodial Efforts
- Place large fans to push air through the building; supervisors work with head custodians to identify the best placement to maximize air circulation without impeding the ventilation system.
- Open windows and doors early morning when possible and safe to do so to allow morning cool air in; once students arrive in the building, doors are closed following Security protocols.
- Leave windows on second story/third story windows open overnight to allow cool air in throughout the night/early morning.
- Keep window shades closed.
- Report HVAC problems promptly.
- Box fans were delivered to schools as requested.

