The study looked at how urban areas affect heat in Sioux Falls, South Dakota. They used satellite data to track temperature changes over 31 years. They found that urban areas were 2.2°C hotter than non-urban areas, with the heat increasing by 0.02°C each year. The more intense the urban development, the hotter it got. The study showed that the heat island effect was consistent within a 5km or 10km radius around the city. This research helps us understand how cities impact temperature changes over time.