Heatwave Sparks Political Firestorm Over Thermostat Settings and Energy Conservation

As a record-breaking heatwave grips the U.S., New York Mayor Zohran Mamdani’s call for residents to set thermostats to 78 degrees Fahrenheit has ignited fierce political backlash, compounded by reports of the Department of Energy (DOE) removing online guidance on energy-saving temperature settings, according to multiple sources.

The DOE removed as many as 6,000 web pages referencing the same type of temperature recommendations and energy-conservation tips, according to an analysis by the Internet Archive. A June 19, 2026, snapshot of the DOE’s website showed a page advising homeowners to “set thermostats as high as comfortable” during summer months, with 75–78 degrees cited as a range for daytime use. The page is no longer accessible on the agency’s site. The DOE has not responded to requests for comment.

How Did the Debate Over 78-Degree Thermostats Emerge?

Mamdani’s July 1, 2026, post on X urging New Yorkers to maintain 78-degree thermostats and reduce energy use drew sharp criticism from political opponents. Fox News highlighted posts mocking the mayor, including one from TV actor and failed Los Angeles mayoral candidate Spencer Pratt, who demanded, “Show us your thermostat, commie.” The controversy intensified as critics argued that 78 degrees was untenable for vulnerable seniors, despite the mayor’s own office adhering to the guideline in city buildings.

What Historical Precedents Exist for Thermostat Energy Rules?

The 78-degree recommendation is not new. Energy Star and the DOE have cited this setting for decades to balance comfort and energy savings, a guideline dating back to 1979 when President Jimmy Carter mandated it for public buildings during an energy shortage. Similar measures were implemented during past heatwaves, including 1999 under then-NYC Mayor Rudolph Giuliani and 2015 under Texas Governor Greg Abbott, who urged Texans to lower energy use to prevent grid failures, according to archived records.

Why Is the 78-Degree Rule Controversial Now?

While the 78-degree standard is cited by organizations including Energy Star, its adoption has become politically charged. Critics argue that the rule is untenable for vulnerable seniors, who may struggle with higher indoor temperatures.

What Are Alternatives to Raising Thermostats During Heatwaves?

There are a variety of technologies and home hacks that can help keep homes cooler in the summer without spiking energy bills, as CNET has reported. The DOE’s removed pages also emphasized “raising the temperature when no one is home,” a practice still endorsed by Energy Star.

How Are States Addressing Grid Strain During Heatwaves?

Texas, which has faced grid problems during extreme weather, has implemented similar conservation measures. In 2021, the state’s energy council, ERCOT, asked citizens to save power by adjusting their thermostats, following a winter freeze that led to 246 deaths.

The intersection of climate resilience, public health, and political polarization underscores the complexity of energy policy during crises. As heatwaves intensify, the debate over thermostat settings reflects broader tensions over how to balance individual comfort with collective safety.