Why are people burnt more due to exposure to steam than due to hot water?

When a substance converts from a liquid to a gas, it needs
to absorb energy. This is called heat the heat of vaporization and for water it is 2.27
MJ/kg. This is a very amount of heat for any substance that is normally found as liquid
on Earth. Every kilogram of steam has 2.27 MJ more heat than a kilogram of
water.

Burns are caused due to the transfer of heat from
other objects to our body. Steam, even if it is at the same temperature as hot water
contains a lot more heat. And usually steam is found at temperatures above 100 degree
Celsius which is the temperature at which it condenses to water. The two main reasons
why burns due to exposure to steam are much worse than those due to exposure to hot
water are that the temperature of steam is usually more than that of water and steam
acquires extra energy during the conversion from water.