The effect goes into effect at noon and is expected to last until 7 p.m. The heat index could hit 105 degrees, according to the National Weather Service.
SEE RELATED STORY: Heat Advisory issued for Saturday
George said public facilities will open and service air-conditioning free of charge through Sunday.
"I advise Fort Bend County residents to prepare for the intense temperatures. I strongly encourage those who are at high risk, children, and the elderly to stay inside air-conditioned buildings during these high temperatures," said George.
The following locations will be open from 9 a.m. to 5 p.m.
George Memorial Library
1001 Golf view Dr.
Richmond, TX 77469
Missouri City Branch Library
1530 Texas Parkway
Missouri City, TX 77489
Albert George Branch Library
9230 Gene Street
Needville, TX 77461
Sienna Branch Library
8411 Sienna Springs Blvd
Missouri City, TX 77459
Bob Lutts Fulshear/Simonton Branch Library
8100 FM 359 South
Fulshear, TX 77441
University Branch Library
14010 University Blvd.
Sugar Land, TX 77479
Cinco Ranch Branch Library
2620 Commercial Center Blvd.
Katy, TX 77494
Sugar Land Branch Library
550 Eldridge Rd.
Sugar Land, TX 77478
First Colony Branch Library
2121 Austin Parkway
Sugar Land, TX 77479
Mamie George Branch Library
320 Dulles Avenue
Stafford, TX 77477
Mission Bend Branch Library
8421 Addicks Clodine Rd.
Houston, TX 77083
Mustang Community Center
4521 FM 521 Rd.
Fresno, TX 77545
Landmark Community Center
100 Louisiana St.
Missouri City, TX 77489
Residents can help reduce electric use by setting their thermostat to 78 degrees or higher, turning off lights and pool pumps, avoid using large appliances like ovens, washing machines, and dryers, and turning off and unplug unnecessary electrical items that are not being used.