ACHR News
search
Ask ACHR NEWS AI
cart
facebook twitter instagram linkedin youtube
  • Sign In
  • Subscribe
  • Sign Out
  • My Account
ACHR News
  • NEWS
    • Breaking News
    • New HVAC Products
    • Featured Products
    • Manufacturer Reports
    • HVAC Data
    • Legislation
    • ACHR NEWS Centennial
  • RESIDENTIAL
    • Air Conditioners
    • Furnaces
    • Residential Heat Pumps
    • Ductless
    • Residential IAQ
    • Testing, Monitoring, Tools
    • Components & Accessories
  • COMMERCIAL
    • Air Handlers
    • Rooftop Units
    • Chillers and Cooling Towers
    • Commercial Heat Pumps
    • Boilers and Hydronics
    • VRF/Ductless
    • Commercial IAQ
  • REFRIGERATION
    • Refrigerants
    • Refrigerant Regulations
    • Leak Management
  • CONTRACTOR PRO
    • Geothermal
    • Homeowner Study
    • VRF and VRV Ductless
    • Unitary Trends
  • EDUCATION
    • Training and Education
    • Business Management
    • Service and Maintenance
    • Continuing Education
    • Market Research >
      • HVAC Brand Awareness Report
      • VRV, VRF, VRVZ Report
      • Unitary Trends Report
      • Water Heat Professionals Report
    • Webinars
    • Sponsor Insights
    • eProducts Info
    • White Papers
  • EVENTS
    • HVAC Contractor Forum
    • Industry Events and Webinars
  • MEDIA
    • Videos
    • AHR Expo 2025 Videos
    • Podcasts >
      • ACHR News Podcast
      • HARDI Podcasts
      • AHR Expo Podcasts
      • ACCA Podcasts
    • Interactive Spotlights
    • Quizzes
    • eBooks
    • HVAC Talkback
  • HVAC GROUP
    • ACHR NEWS >
      • Current Issue
      • Digital Edition
      • Subscribe
    • Distribution Trends
    • SNIPS NEWS >
      • Join SNIPS NEWS
    • Engineered Systems News >
      • Join ES News
    • HVACR Directory
    • Contests
    • Newsletters
    • Contact
    • Advertise
    • My Account
HVAC Breaking News

Aug. 18, 2003: U.S. Suffers Largest Blackout In History

By Greg Mazurkiewicz
August 18, 2003
DETROIT — The largest power blackout in United States history closed down a major portion of the northeastern United States as well as part of Canada late Thursday afternoon, Aug. 14, 2003, at approximately 4:10 p.m. Eastern Daylight Time (EDT). Power was gradually restored over the weekend. Officials stated that it could take at least until this morning, Monday, Aug. 18, before power could be brought back to full capacity in all the affected areas.

The blackout impacted eight states stretching from Connecticut to southeastern Michigan (including the headquarters of The News). The states that were affected included parts of Connecticut, Massachusetts, Michigan, New Jersey, New York, Ohio, Pennsylvania, and Vermont. A portion of the province of Ontario in Canada also lost power. Major cities that lost power included Cleveland, Detroit, New York, and Toronto.

At least three states declared a state of emergency, including Michigan, New Jersey, and New York.

The North American Electric Reliability Council (NERC), a voluntary organization that oversees the electrical grid, reported that over a hundred electric power plants were shut down by the blackout, which affected approximately 50 million people encompassing a 9,300-square-mile area.

The precise cause of the blackout is still unknown. The initial theory offered by Canadian authorities had the cause centered in the Niagara Falls area in New York. Another theory said it started in Lansing, Mich., and moved eastward. Still another said it was centered in Ohio. An investigation is underway and officials said it could be days or even weeks before the trigger point is determined.

A statement released by Michehl R. Gent, president and CEO of NERC, said, "We now are fairly certain this disturbance started in Ohio. We are now trying to determine why this situation was not brought under control after the first three transmission lines relayed out of service. We will get to the bottom of this."

The three transmission lines referred to by Gent have been attributed to FirstEnergy Corp. of Akron, Ohio.

Gent added, "We are now turning our attention to collecting the necessary data on the events from all of the system operators that were involved in the blackout. There were probably over 10,000 discrete system events that we will need to examine."

Looking for quick answers on air conditioning, heating and refrigeration topics? Try Ask ACHR NEWS, our new smart AI search tool. Ask ACHR NEWS →

Rep. Billy Tauzin (R-La.), Chairman of the House Energy and Commerce Committee, stated that he will hold a congressional hearing to look into the blackout.

Publication date: 08/18/2003

Share This Story

Looking for a reprint of this article?
From high-res PDFs to custom plaques, order your copy today!

 

Greg Mazurkiewicz is Web Editor. He can be contacted at 248-244-6459 or gregmazurkiewicz@achrnews.com. Greg handles the day-to-day operations of The NEWS' website, www.achrnews.com, including the Extra Edition page, which offers additional online-exclusive articles. He has 40 years of experience as a writer and editor. He holds a bachelor's degree in Journalism and a master's degree in Business Management.

Recommended Content

JOIN TODAY
To unlock your recommendations.

Already have an account? Sign In

  • HVAC-enrollment

    The Trades Are Back: HVACR Programs See Nearly 30% Enrollment Spike

    A new wave of future technicians is entering the pipeline.  
    Training and Education
    By: Matt Jachman
  • 2025 Top 40 Under 40

    2025 Top 40 Under 40 HVACR Professionals List

    The 11th annual Top 40 Under 40 list highlights those...
    News
    By: Hannah Belloli-Oster
  • LG Ductless Mini-Split Systems

    The 9 Types of Heat Pumps

    As the U.S. moves toward electrification, heat pumps are...
    News
    By: Joanna R. Turpin
Subscription Center
  • Create an Account
  • Start a Subscription
  • Manage My Account
  • Sign Up for Newsletters
  • Visit Customer Service
  • Update Preferences

More Videos

Sponsored Content

Sponsored Content is a special paid section where industry companies provide high quality, objective, non-commercial content around topics of interest to The News audience. All Sponsored Content is supplied by the advertising company and any opinions expressed in this article are those of the author and not necessarily reflect the views of The News or its parent company, BNP Media. Interested in participating in our Sponsored Content section? Contact your local rep!

close
  • Piggy Bank
    Sponsored byWatercress Financial

    Energy Prices, Inflation, and HVAC: What Today’s Homeowners Care About

  • Refrigerated Food
    Sponsored bySolstice Advanced Materials

    R-455A Refrigeration: A Cold Storage Solution for the Future

  • Airex Rooftop Units
    Sponsored byAirex Manufacturing Inc

    Consolidating Roof Penetrations: A Growing Trend in Multifamily HVAC Design

Popular Stories

HVAC-Price-Increase-graphic

HVAC Price Increase List: June 2026

Trump-Section-232.jpg

Trump Reduces Section 232 Tariffs on HVAC Equipment to 15%

R410A-Refrigerant-Cylinder.jpg

Refrigerant Recovery is a Revenue Opportunity

Heat-pump-cutaway.jpg

PFAS Rules and A2L Building Codes Continue to Evolve

Kroger.jpg

Kroger to Spend $100 Million to Reduce Refrigerant Leaks

View The ACHR NEWS
Centennial Anniversary Timeline

The ACHR News Timeline Chart
Submit a Letter
Submit a letter to our editors.

Events

November 6, 2025

Next-Gen Data Center Cooling: HVAC Innovation and Real-World Solutions

On Demand As AI workloads and high-density computing push traditional cooling methods to their limits, the data center industry is accelerating the adoption of next-generation HVAC technologies.

June 9, 2026

Before You Go All In on AI: Set Up Your Business to Actually Win

In this webinar, we'll walk you through exactly what to get in place before you add AI to your business. You'll leave with a clear picture of where you stand today and a practical action plan to set yourself up for real results.

View All Submit An Event

Poll

Summer Staff

Are you fully staffed for the summer season?
View Results Poll Archive

Products

BNI Mechanical/Electrical Square Foot Costbook, 2026 Edition

BNI Mechanical/Electrical Square Foot Costbook, 2026 Edition

See More Products
A2L Refrigerants - Free Webinar - May 21, 2026

Related Articles

  • Nevada Has a Blackout in the Las Vegas Valley

    See More
  • This Week In History: June 18, 2001

    See More
  • Nov. 26, 2003: U.S. Economy Grew 8.2 Percent In Third Quarter

    See More

Related Directories

  • Guntner U.S. LLC

    Güntner is a world-leading company with over 90 years of leading engineering solutions in heating and cooling systems, offering a wide variety of air coolers, dry coolers, evaporative condensers, gas coolers etc.
  • U.S. Boiler Co.

    Proudly offering residential and commercial hydronic heating products that have been designed, engineered, and manufactured in America.
×

Sign Up. Stay Informed.

The #1 trusted source for the HVACR industry since 1926

SUBSCRIBE
  • RESOURCES
    • Advertise
    • Contact Us
    • Advisory Board
    • Classifieds
    • Submit a Letter
    • Directories
    • Store
  • ACCOUNT CENTER
    • Create an Account
    • Start a Subscription
    • Manage My Account
    • Sign Up for Newsletters
    • Visit Customer Service
    • Update Preferences
  • SERVICES
    • Marketing Services
    • Reprints
    • Market Research
    • List Rental
    • Survey/Respondent Access
  • STAY CONNECTED
    • LinkedIn
    • Facebook
    • Instagram
    • YouTube
    • X (Twitter)
  • PRIVACY
    • PRIVACY POLICY
    • TERMS & CONDITIONS
    • DO NOT SELL MY PERSONAL INFORMATION
    • PRIVACY REQUEST
    • ACCESSIBILITY

Copyright ©2026. All Rights Reserved BNP Media, Inc. and BNP Media II, LLC.

Design, CMS, Hosting & Web Development :: ePublishing