Company: EAI
Filing Date: 2025-08-06
Form Type: S-3ASR
Source: 0001193125-25-174487
Chunk: 238

Company: ENTERGY ARKANSAS, LLC
Filing Date: 2025-08-06
Form: S-3ASR
Chunk 238
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, 2025 
 August 6, 2025 |
|:-------------------------|:----|:-----------------------------------------------------------------------|:----|:---------------|
| /s/ Reginald T. Jackson  
 Reginald T. Jackson      |     | Senior Vice President and Chief Accounting Officer                     
 (Principal Accounting Officer)                                         |     | August 6, 2025 |
| /s/ Kimberly Cook-Nelson 
 Kimberly Cook-Nelson     |     | Director                                                               |     | August 6, 2025 |

S-5

SIGNATURES Pursuant to the requirements of the Securities Act of 1933, Entergy Texas, Inc. certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3and has duly caused the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New Orleans, State of Louisiana, on August 6, 2025.

| ENTERGY TEXAS, INC. |     |                                     |
| By:                 |     | /s/ Barrett E. Green                |
|                     |     | Barrett E. Green Vice President and 
 Treasurer                           |

KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears immediately below, constitutes and appoints Marcus V. Brown, Kimberly A. Fontan, Reginald T. Jackson and Barrett E. Green, and each of them, his or her true and lawful attorney-in-factand agent, with full power of substitution, for him or her and in his or her name, place, and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to the Registration Statement and to file the same with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-factand agent full power and authority to do and to perform each and every act and thing requisite and necessary to be done, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-factand agent or his or her substitute or substitutes may lawfully do or cause to be done by virtue hereof. Pursuant to the requirements of the Securities Act of 1933, the Registration Statement has been signed by the following persons in the capacities and on the dates indicated.

| Signature                
 /s/ Eliecer Viamontes    
 Elie