About 2,000 electricity customer in Arkansas, including in downtown, were without power starting 1:45 p.m. Monday, according to Westar Energy.
The problem is believed to be at the Paris Park Substation and was affecting a larger portion of the west half of Ark City.
Businesses were closing doors to customers, and traffic lights were not working.
The City of Arkansas City asked motorists to please drive safely and reminded them, an intersection with lights out works as a four-way stop, with cars required to yield to the right.
Power to City Hall was out, but a generator was being used. The non-emergency number for first responders 441-4444 was not working, and people were advised to call 221-5555.
The heat index was expected to hit 107 today, and emergency officials were receiving calls about elderly residents suffering from heat in their homes.
Most of the power was back on around 2:30 p.m. according to Facebook posts.
Check back for more updates.