Fennel seeds work as a coolant and is popular in India to drink fennel seed tea as a home remedy to overcome heat during summers. Soak 3 tbsps of fennel seeds/saunf in half a cup of water for 2 hours. Strain the water and grind the seeds along with sugar candy or mishri. Add the strained water to the ground saunf mixture and pass through a sieve. Store the strained fennel seeds water in the refrigerator and serve chilled.