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Major Power Outage Events From 2000 to 2020
Power outages affecting Illinois and at least 50,000 customers
| Date | Area Affected | Event Type | Number of Customers Affected |
|---|---|---|---|
| 05/18/2000 | Illinois | Severe Weather High Wind | 101830 |
| 08/06/2000 | Illinois | Severe Weather | 239567 |
| 08/02/2002 | Illinois | Interruption Of Firm Power | 53565 |
| 07/05/2003 | Illinois | Severe Storms | 130000 |
| 07/07/2003 | Illinois | Severe Thunderstorms | 72000 |
| 11/12/2003 | Illinois | High Winds | 51000 |
| 07/21/2004 | Illinois | Severe Thunderstorms | 200000 |
| 08/03/2004 | Illinois | Severe Storm | 127000 |
| 06/24/2005 | Illinois | Transmission Equipment Failure | 51500 |
| 03/12/2006 | Illinois | Severe Weather | 65400 |
| 07/17/2006 | Illinois | Severe Lightning Storms | 170519 |
| 07/19/2006 | Missouri, Illinois | Severe Storms (3) (Many Customers Experienced Multiple Outages.) | 2500000 |
| 10/02/2006 | Illinois | Severe Thunderstorms | 471932 |
| 11/30/2006 | Missouri, Illinois | Ice Storm | 550000 |
| 01/13/2007 | Missouri, Illinois | Ice Storm | 225000 |
| 02/24/2007 | Iowa, Illinois | Ice Storm | 75000 |
| 07/18/2007 | Illinois | Severe Weather | 135000 |
| 08/23/2007 | Illinois | Severe Storms | 629590 |
| 12/23/2007 | Illinois | Severe Storm | 237000 |
| 05/30/2008 | Illinois | Severe Storms | 109000 |
| 06/08/2008 | Illinois | Severe Weather | 125000 |
| 06/15/2008 | Illinois | Severe Weather | 165000 |
| 07/21/2008 | Iowa, Illinois | Storm | 185000 |
| 08/04/2008 | Illinois | Severe Weather | 653000 |
| 09/14/2008 | Missouri, Illinois | Hurricane Ike | 107000 |
| 01/28/2009 | Illinois, Indiana, Ohio, Kentucky | Winter Storm | 230300 |
| 05/08/2009 | Illinois | Severe Thunderstorm | 68800 |
| 06/19/2009 | Illinois | Severe Storm | 245000 |
| 06/18/2010 | Illinois | Severe Weather | 400000 |
| 06/23/2010 | Illinois | Severe Weather | 300000 |
| 10/26/2010 | Illinois | Thunderstorms | 192106 |
| 10/27/2010 | Illinois | High Winds | 127000 |
| 02/01/2011 | Illinois | Winter Storm | 190000 |
| 04/19/2011 | Illinois | Severe Weather | 80000 |
| 06/09/2011 | Illinois | Severe Thunderstorms | 169000 |
| 06/21/2011 | Illinois | Severe Thunderstorms | 300000 |
| 06/27/2011 | Illinois, Missouri | Severe Thunderstorms | 80000 |
| 06/30/2011 | Illinois | Severe Weather | 121000 |
| 07/11/2011 | Illinois | Severe Weather | 500000 |
| 07/23/2011 | Illinois | Severe Weather | 169000 |
| 08/02/2011 | Illinois | Severe Weather | 71500 |
| 06/29/2012 | Illinois | Severe Weather - Thunderstorms | 109000 |
| 07/01/2012 | Illinois | Severe Weather - Thunderstorms | 320000 |
| 07/18/2012 | Illinois | Severe Weather - Thunderstorms | 181000 |
| 07/24/2012 | Illinois | Severe Weather - Thunderstorms | 330000 |
| 08/04/2012 | Illinois | Severe Weather - Thunderstorms | 325000 |
| 06/24/2013 | Illinois | Severe Weather - Thunderstorms | 283451 |
| 08/30/2013 | Illinois | Severe Weather - Thunderstorms | 157000 |
| 11/17/2013 | Missouri, Illinois | Severe Weather - Tornadoes | 200000 |
| 11/17/2013 | Illinois | Severe Weather - Thunderstorms | 190000 |
| 02/20/2014 | Missouri, Illinois | Severe Weather - Snow/Ice | 66000 |
| 06/30/2014 | Illinois | Severe Weather - Thunderstorms | 420000 |
| 09/05/2014 | Illinois | Severe Weather - Thunderstorms | 180400 |
| 08/03/2015 | Illinois | Severe Weather | 115000 |
| 07/23/2017 | Missouri, Illinois | Severe Weather | 82000 |
| 06/28/2018 | Missouri, Illinois | Severe Weather | 112000 |
| 08/29/2018 | Illinois | Severe Weather | 100000 |
| 11/25/2018 | Illinois | Severe Weather | 313448 |
| 06/30/2019 | Illinois | Severe Weather | 100000 |
| 08/10/2020 | Illinois, Missouri | Severe Weather | 135000 |
| 08/10/2020 | Iowa, Illinois | Severe Weather | 300000 |
| 08/10/2020 | Illinois | Severe Weather | 856000 |
Data Source: U.S. Department of Energy
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