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US electricity prices rise as a brutal heatwave stresses grids

The U.S. electricity prices have risen to their highest level since winter, as businesses and homes turned up their air conditioners in order to escape the brutal heatwave that blanketed the eastern half. This has put a strain on regional power grids.

Extreme weather reminds the consumers of the deadly freeze in February 2020, which left millions of Texans with no power, water or heat for days. And a brutal heatwave in August 2020 that caused the

California

The power grid imposed rotating outages on about 800,000 consumers over two days.

AccuWeather, a weather forecaster, predicted high temperatures for New York City, the largest city in the United States.

United States

On Monday, the mercury is expected to reach 98 F. This will break the record set 137 years ago of 96 F.

The weather is expected to rapidly cool down in New York from 94 F to 85 F by Thursday, and then to 78 F by Friday.

This compares to the current record highs for Monday and Tuesday of 96 F, set in 1888. A normal high of 82 F is also seen in New York at this time of year.

Prices for next-day electricity at the PJM West hub In Pennsylvania, the cost of electricity has risen by more than 430% since January to $211 per Megawatt Hour (MWh).

New England Power prices have risen by more than 18% to $161 per MWh - their highest level since February.

This compares to average power prices of $55 per megawatt hour in PJM, and $81 per megawatt hour in New England for 2025.

HEAT WEATHER ALERT

PJM Interconnection operates the power grid for all or part of 13 states.

New Jersey

Illinois

The alert, which was issued on Monday, asked generators to be prepared to run at full capacity in the event of a heat wave.

PJM predicted that power demand would reach 160,000 Megawatts (MW), 158,000 MW, and 155,000 MW for Monday.

On a normal day, one megawatt is enough to power around 800 homes. However, this number drops dramatically on hot summer days when air conditioners are turned up in homes and offices.

Grid operator says the alert is aimed primarily at transmission and generator owners, who can plan maintenance accordingly. It also sends a signal to nearby regions that PJM exports of power may have to be curtailed. Reporting by Scott DiSavino, New York; and IshaanArora, Bengaluru. Editing by Jan Harvey & Andrea Ricci.

(source: Reuters)