While in cold climates, tea is used to warm up, hot tea can also be used to cool down, such as Moroccan mint tea, a brew of green tea leaves mixed with mint leaves.
Many older people make a daily brew of mountain tea from dried herbs such as sage, thyme, mint, and chamomile, and sweeten it with honey from local bees.
If you brew a green tea at 80C for 2 minutes, you will not observe a (statistically significant) difference in taste versus 1 min at 90C or 30 seconds at boiling.