The US National Weather Service on Thursday said the Midwest and Ohio Valley are expected to experience heavy to excessive rainfall and flash flooding threats over the next two days due to an active pattern.
Meanwhile, the central/southern Plains and Southeast US likely to face persistent dangerous heat into next week, with many places expected to record their hottest temperatures for the year thus far and potential for record-tying/breaking temperatures.
The NWS early Thursday issued a red flag warning for Oregon's Baker City, Burns, La Grande, Ontario, John Day, Bend, Redmond, Prineville, Madras, Fossil, Monument, Jordan Valley, and Chemult, primarily served by PacifiCorp's Pacific Power and Idacorp's (IDA) Idaho Power.
A similar warning was raised for Washington's Republic, Colville, Omak, Coulee Dam, and Spokane, which mostly fall under the service area of Avista's (AVA) Avista Utilities.
Affected areas in Idaho include Bonners Ferry, Sandpoint, Coeur D Alene, McCall, Stanley, Idaho City, Caldwell, Boise, Mountain Home, Jerome, Twin Falls, Shoup, Challis, Stanley, Sun Valley, Hailey, Shoshone, Pocatello, Blackfoot, Burley, Soda Springs, Malad City, Preston, Montpelier, Palisades, Driggs, Island Park, Salmon, Arco, Mackay, and Dubois.
Idaho Power, Avista Utilities, and PacifiCorp's Rocky Mountain Power are the major electricity service providers in Idaho.
The NWS also issued red flag warnings for Jackson in Wyoming, served by Rocky Mountain Power; and areas near Placerville, Murphys, Sonora, Jackson, and South Lake Tahoe in California, where Algonquin Power & Utilities (AQN) unit Liberty and PG&E (PCG) subsidiary Pacific Gas and Electric are the primary service providers.
In Texas, a red flag warning was also issued for Clarendon, Pampa, Perryton, primarily served by Xcel Energy (XEL) and American Electric Power (AEP) through its Texas subsidiary.
Also placed under a red flag warning watch were Oklahoma's Beaver, Elk City, Gage, parts of Woodward, and areas near Altus. Woodward was also covered under an extreme heat warning watch, along with Alva, Enid, Stillwater and Ponca City. OGE Energy (OGE) unit Oklahoma Gas & Electric and AEP subsidiary Public Service Co. of Oklahoma are the major service providers in Oklahoma.
The NWS issued an extreme heat warning for most of Missouri, except for Macon, Chillicothe, Kirksville, Trenton, St. Joseph, Bethany, Maryville, Grant City, and Rock Port. Evergy (EVRG), Ameren's (AEE) Missouri unit, and Liberty are the major service providers in the state.
In Kansas, where Evergy is among the major service providers, affected areas include Russell, Lincoln, Ellsworth, Salina, Great Bend, McPherson, Hutchinson, Newton, Kingman, Anthony, Medicine Lodge, Wellington, Arkansas City, Wichita, Manhattan, El Dorado, Emporia, Eureka, Howard, Sedan, Fredonia, Iola, Concordia, Lawrence, and Paola.
In Arkansas, extreme heat warnings were issued for Mountain Home, Little Rock, Conway, Brinkley, Searcy, Batesville, and Jonesboro, which primarily fall under the service area of Entergy's (ETR) Arkansas unit.
Also placed under extreme heat warnings were Mississippi's Clarksdale, served by Entergy's Mississippi unit; and Carbondale, Carmi, Mount Vernon, and Chester in Illinois, where Ameren's Illinois unit is the primary service provider.
Similar warnings were raised for Kentucky's Mayfield, Paducah, Hopkinsville, Madisonville, and Owensboro. Kentucky is primarily served by PPL (PPL) subsidiary Louisville Gas and Electric & Kentucky Utilities, AEP unit Kentucky Power, and Duke Energy (DUK) among others.
Evansville and Petersburg in Indiana were placed under an extreme heat warning watch, while a flood warning was raised for Muncie, Terre Haute, Greensburg, Indianapolis, Kokomo, Marion, and Seymour. NiSource (NI) unit Northern Indiana Public Service Company, Duke Energy, and the Indiana unit of AES (AES) are among the major service providers in the state.
Flood warnings were also issued for small pockets of Ohio, South Dakota and Arizona.
In Arizona, the NWS also issued a flash flood warning for Parker, Phoenix and Wickenburg, primarily served by Pinnacle West Capital (PNW) unit Arizona Public Service Company.
A severe thunderstorm warning was issued for Nebraska's Norfolk and Columbus, with parts of these places also covered by a tornado warning. Nebraska mostly falls under the service area of regional transmission organization Southwest Power Pool, with Midcontinent ISO also serving some areas.
About 505,041 homes and businesses in the US Midwest faced power supply outages on Thursday, with Indiana accounting for 262,703 such cases. About 254,913 of these customers are served by Northern Indiana Public Service Company, according to PowerOutage.us data.