One convenience store in Houston reportedly charged $20 for a gallon of gas, $8.50 for a bottle of water and $99 for a case of water, according to the Texas Attorney General's office.
The state has received 684 complaints in all, according to Kayleigh Lovvorn, a spokeswoman for the office.
U.S. Energy Secretary Rick Perry on Thursday said that even though gas prices will increase because of supply issues, retailers should be wary of inflating prices unfairly.
"Every state's attorney general will be watching to make sure that there's no price Gouging going on," he said, adding that all who are considering raising prices inappropriately "need to watch out."
Parts of Texas remain under inches of floodwater and experts predict a lengthy recovery.
- Price-gouging complaints during Hurricane Harvey by industryDaily Mail
- The Worst Examples of Hurricane Harvey Price GougingYahoo News UK
- Consumers Should Be Aware Of Gasoline Price GougingCBS Houston
- If you think you see price-gouging, file a complaint with the AGWFAA
- Texas stores accused of price-gouging in wake of HarveyBangor Daily News
- Texas' top cop of Tea Party fame won't cotton to price-gougingMyNewsLA.com
- Collin County wants back the money it spent on AG Ken Paxton's prosecutionDallas News
- Paxton: Looters, Price Gougers Face Fines, JailNewsmax
- Column: Price gouging is actually a good thingThe Daily Courier