More people are buying portable generators. 

"It's big because of what happened with the freeze not too long ago when people were without any power,” Jorge Sandoval, a generator expert, explained.

Many hardware stores are finding themselves out of stock after ERCOT asked Texans to reduce their energy usage earlier this week.

RELATED: Facing the Fury: A guide to portable generators

If you're thinking about buying a portable generator, keep in mind there is a difference in generators.

“Batteries have to be charged or solar system, those are only for indoors,” Sandoval said. “Anything with gas propane or diesel are for outdoors."

Generators can cost around $500 and can power a microwave or small freezer for four to five hours.

Remember to keep those outdoor generators away from your home as putting them too close can expose your family to carbon monoxide.