Is it useful to put a basin of water in the room?

Ice water has a certain cooling effect, but normal temperature water has little effect.

It is hot in summer, and it may be sultry in rainy season. You can put a basin of ice water or water containing ice crystals indoors. The evaporation of water will take away the indoor heat, which can play a certain role in cooling down, and the low temperature will help take away the indoor heat.