New York City’s electric utility, Con Edison, spent Thursday working to keep its power grid stable as a dangerous heat wave sent temperatures to 100 degrees, the hottest conditions the city has experienced in years. The National Weather Service placed New York under an Extreme Heat Warning through the July 4 weekend, with temperatures reaching 100 degrees Thursday and remaining dangerously hot into Friday. Heat index values are expected to climb as high as 110 to 115 degrees across parts of the tri-state area.

To keep its equipment from failing under the strain, Con Edison reduced voltage by 8% in the northwest Bronx and the northern tip of Manhattan, a protective measure that affected roughly 39,600 customers in the Bronx. The company activated its Emergency Response Center earlier in the week, placed repair crews on standby, and asked customers to reduce electricity use between 2 p.m. and 10 p.m., when air-conditioning demand is at its highest.

For most New Yorkers, the power grid is invisible until it stops working. For the businesses that depend on it, a heat wave like this is a direct hit to the bottom line — and a preview of a more expensive future.

When millions of air conditioners switch on at once, the strain falls hardest on the aging network of underground cables and substations beneath the city. Con Edison says it invested a record $3.9 billion upgrading its systems across New York City and Westchester County ahead of this summer to handle the more frequent and more intense heat waves the region is now experiencing. That investment comes with a price.

The utility has proposed raising electric rates by about 11.3% and gas rates by 13.4% across New York City and Westchester, increases that would affect roughly 3.6 million residential customers and more than 368,000 commercial accounts if approved by the New York Public Service Commission. Con Edison says the increases are needed to fund reliability upgrades like those being put to the test this week. Critics argue New Yorkers already pay some of the nation’s highest energy bills. The average city household using 600 kilowatt-hours a month paid about $218.55 in 2025, up from roughly $142.51 in 2016.

Small businesses feel the impact most. Restaurants, retail stores and offices that must keep customers and employees comfortable cannot simply turn off the air conditioning. Summer electricity bills for a typical small business could increase by around 8% under the proposal, while larger commercial users could see increases closer to 10%. During triple-digit heat, keeping the lights on and the building cool is not optional — it is the cost of staying in business.

That reality has created a growing demand-response industry. Through Con Edison’s Smart Usage Rewards program, customers with smart meters can earn payments for voluntarily reducing electricity use during peak demand periods. Frank Bruckner, co-founder and CEO of Meltek, one of the utility’s demand-response partners, said nearly all customers with smart meters are eligible, yet most have never heard of the program. His company currently works with about 6,000 participants. The economic logic is simple: paying customers to reduce usage during peak hours is less expensive than operating older, less-efficient “peaker” power plants that run only on the hottest days.

The pressure extends well beyond New York. This week, Energy Secretary Chris Wright signed two emergency orders under the Federal Power Act authorizing PJM Interconnection — the grid operator serving New Jersey, Pennsylvania and 11 other states — to curtail electricity use by large power consumers, including some data centers, and allow certain power plants to operate beyond normal pollution limits through July 3. PJM forecast record electricity demand of about 166,304 megawatts for Thursday, potentially surpassing its all-time record set in 2006. Although New York operates on a separate grid managed by the New York Independent System Operator, the federal action highlights how severely the heat is straining power systems across the East Coast and how rapidly expanding energy-hungry data centers are reshaping electricity demand.

City Hall is urging conservation to reduce pressure on the grid. Mayor Zohran Mamdani asked residents and businesses to set thermostats to 78 degrees while coordinating with Con Edison and National Grid. The city also kept municipal buildings at 78 degrees, dimmed lights during peak demand, opened additional cooling centers, extended pool hours and temporarily suspended evictions for two days. While the request has drawn political criticism, reducing electricity demand during peak hours lowers the risk of outages that can cost businesses sales, disrupt operations and spoil inventory.

The forecast offers little relief before the holiday weekend. With temperatures expected to remain near 100 through Friday before gradually easing, the strain on New York’s electric grid — and on the budgets of the households and businesses that rely on it — is likely to continue through the Fourth of July.

JBizNews Desk | New York

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