like the clouds —

 being the one who rains mercy on the favourable ones, like a dark cloud —

 thirumangai āzhvār who is a cloud, raining mercy —

cloud which rains joy —

by whom was the hailstorm prevented —

from the hale strom —

hail storm (which was caused by indhra since his worship was interrupted) —

hailstorm —

 rain which made everyone freeśe —

from rain —

ḍuring the rainy season —

rain —

 heavy rain —

due to non-stop rains —

the wrath of the rain god —