In 2006, a record-breaking heatwave pushed New England's power grid to its limit. A decision made years later is now saving people up to $149 million during extreme summer heat

A record-breaking heatwave nearly two decades ago exposed just how vulnerable New England's electricity grid was during scorching summers. On August 2, 2006, temperatures in Massachusetts climbed to 99°F with 65% humidity, prompting residents to switch on air conditioners and fans at unprecedented levels. The surge in electricity demand set an all-time record on the regional power grid.

At the time, New England already had some of the highest electricity prices in the United States. But what happened in the years that followed has now become a powerful example of how long-term clean energy investments can pay off.