Why 78 degrees isn't the right thermostat setting for everyone during a heat wave

Across the U.S., it's a hot summer, and electricity prices are high.

Various public officials and corporate websites suggest people set their thermostats to 78°F (25.6°C), or even 81°F (27.2°C), as a way to stay relatively cool without breaking the bank.

But as someone who studies energy costs, I know from both personal and professional experience that it's not that simple. ...