The provided text describes a scenario where people go swimming to cool down. What is the significance of the phrase 'swim in the river' in this context?

The people danced to music until they were very hot. To cool down, they decided to go for a swim in the river. The village children helped the visitors store their party dresses and lent them clothes. Everyone had a lot of fun swimming until they were tired, then they got dressed. It was after Attaa Kumaa had finished swimming and was drying herself that she found something (the text cuts off here).