Some places across KOTA Territory have seen an increase in the number of visitors, as people try to escape the outdoors.
Bonnie Morris, visitor services at The Journey Museum, says they've seen nearly 300 more people in the past week and a half, than in the beginning of August.
People are also using the mall as a way to cool off, especially with schools letting kids out early.
The homeless and working poor in South Dakota also have a way to escape the heat, using the Hope Center on Kansas City Street. At the center they are offered air conditioning and water.
For tourist Elaine Formby, this heat means changing plans. "We were going to hike Harney, but we do have some good mental capacity that says no, don't hike today, wait until it gets cooler," said Formby. "So we're hoping to do some indoor activities."
Until the temperature cools off, people need to stay hydrated.