Classrooms nationwide need more back-to-school cooling
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Classrooms nationwide need more cooling during back-to-school season now compared with past decades, a new analysis finds.
Why it matters: Maintaining a comfortable and healthy environment in schools is key to kids' educational success, but that's getting harder amid a warming climate.
- Many schools are already making adjustments — some in the Austin area, for example, have shifted recess earlier and are limiting kids' outside time, Axios' Nicole Cobler reports.
Driving the news: A Climate Central report finds that cooling demand between late July and early September increased in 95% of nearly 250 U.S. locations between 1970 and 2023.
- The nonprofit climate research group's analysis is based on a metric called "cooling degree days" (CDD), which measures the difference between a location's daily average outdoor temperature and 65°F — "considered the ideal indoor temperature," per the report.
- "For example, a day with an average temperature of 90°F has 25 CDD (90°- 65°)."
What they did: To get annual demand, CDD was added together for every day in the seven-week period when students typically return to school.
Zoom in: Reno, Nevada (+320%); Eureka, California (+300%); and San Francisco (+240%) saw the biggest percentage increases in back-to-school CDD between 1970 and 2023.
Between the lines: Back-to-school cooling demand was around 34% higher over the last decade largely due to human-caused climate change, Climate Central estimates.
- That's based on the group's Climate Shift Index, which seeks to measure how climate change has affected daily temperatures.
Threat level: Many schools in rapidly-warming locations also start school in mid-to-late August, when heat waves can strike.
What's next: Like other buildings, schools must adapt to a changing climate — and that can mean costly upgrades.
- "Buildings can be retrofitted with better windows and insulation to reduce energy waste, and existing fossil-fuel burning systems can be replaced with safer, more energy-efficient options," per Climate Central.
