While extinguishing the fire, three police officers were hospitalised for smoke inhalation.
The suspect confessed to lighting the fire when police carried out a search warrant at her house.
She was taken into custody and given a first-degree arson charge.
Although no reason has been identified, a preliminary investigation revealed that the fire was "intentionally set."
The inside and roof of the store were severely damaged.
A body camera video from the one of the responding cops inside the business was also made public by the police.
Authorities are looking into the event, but no information regarding its origins was provided.