Question

why water as steam may cause severe burn but ice has cooling effects.explain

Answer 1

bcoz steam absorbs extra energy or latent heat of vaporization

Answer 2

water as steam has a temperature of about 100℃ and above which can burn or skin as the temperature is high.
On the other hand water as I've has a temperature of 0℃ and below which has a cooling effect as the temperature is lower.