PJM Interconnection Issues Hot Weather Alert For June 29 In Western Region, June 30 to July 3 For Entire Service Area; 5th Alert This Season

On June 26, the PJM Interconnection issued a Hot Weather Alert for its Western Region for June 29 and a Hot Weather Alert for the entire region PJM for June 30 to July 3 ahead of an expected prolonged period of 90+ degree weather.

Pennsylvania would be impacted by the June 30 and July 3 Alert.

PJM also issued a Maintenance Outage Recall on June 25 ahead of next week’s forecasted hot weather. 

The recall requests for all maintenance outages to be returned to service by June 29 to increase the amount of generation available to meet customer demand.

A Hot Weather Alert is an established procedure PJM issues ahead of forecasted hot weather and/or high humidity to prepare transmission and generation personnel and facilities for expected increases in electricity demand, or load. High temperatures are expected to remain in the 90s throughout the week of June 29.

This procedure does not require any action from customers.

Previous Hot Weather Alerts were issued for May 18 to 20, June 5-6, June 11-12 and June 18.

Forecasted Peaks

As of 5 a.m. on June 26, 2026, PJM is expecting to serve the following approximate peak loads on June 29 through July 2-- 

-- June 29 - 141,807 MW

-- June 30 - 150,188 MW

-- July 1 - 157,827 MW

-- July 2 - 160,892 MW

These numbers are official as of 5 a.m. on June 26, 2026. They are subject to change and will be updated periodically. PJM publishes load forecasts out to seven days on Data Miner.

PJM’s record summer hourly integrated peak is 165,563 MW, set in 2006.

Click Here for the PJM announcement.

The PJM Interconnection coordinates the wholesale electricity grid and markets for all or parts of 13 states—Delaware, Illinois, Indiana, Kentucky, Maryland, Michigan, New Jersey, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, and West Virginia—plus the District of Columbia.

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-- PA House Passes Bill Giving Individual Municipalities Authority To Pause Consideration Of A.I. Data Center Proposals For 6 Months  [PaEN] 

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-- PA House Unanimously Passes Bill To Eliminate 6% Gross Receipts Tax On Electric Bills, Fix Electric, Natural Gas, Water, Wastewater Utility Ratemaking Process To Limit Shareholder Profits  [PaEN] 

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-- PJM Adds New Emergency Procedures To Deal With Strained Grid: A Capacity Advisory; Directive For Data Centers To Use Backup Generators  [PaEN] 

-- PJM Interconnection Issues Hot Weather Alert For June 29 In Western Region, June 30 to July 3 For Entire Service Area; 5th Alert This Season  [PaEN]

-- Lt. Gov. Davis Brings Together Utility Industry Experts To Highlight Solutions To Rising Energy Costs

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NewsClips:

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-- PennLive: Western PA Coal Towns Are Ground Zero For A.I. Data Centers: ‘A Boom Coming’ 

-- Pittsburgh Business Times: How A.I. Data Centers Lost The PR War And What It Means For Business

-- AP: A.I. Is An Energy And Water Hog, Here’s What You Can Do To Counter That

-- Utility Dive: Grid Operators Making Significant Progress In Generation Queues, But No Evidence Requests Are Being Processed More Quickly; Fast-Track Policies Promote Fossil-Fuel Heavy Generation 

-- Utility Dive: North American Electric Reliability Corp: Deployable Generation Reserves Shrinking As Coal, Gas-Fired Power Plants Forced Outage Rates Rise

-- Utility Dive: US DOE Orders Keeping Power Plants Open Beyond Their Closure Dates Are Incurring $550 Million In Added Costs, What Are The Benefits?

-- Utility Dive: US DOE Offers $17.5 Billion In Loans For 10 Westinghouse Nuclear Power Reactors; Westinghouse Has Signed Letters Of Intent With 7 Partners, Each With Identified Project Sites 

-- Wall Street Journal: A.I. Data Center Boom Sparking Third Wave Of Inflation - Cost Of Computer Chips - Following Energy, Labor & Constructions Costs

[Posted: June 26, 2026]  PA Environment Digest