One of the nuclear power plants experiences a crack in the protection of the core when the cooling system malfunctions. The thought is that the cooling system was tampered with. Healthcare facilities in the area are inundated with victims residing in the area around the power plant. What category of disaster would this be?

This the category of this disaster is a  radiologic disaster

Explanation:

Now in order to gain a good understanding of the solution above let explain the concept

Radiologic Disaster:

   This can be defined as a type of disaster that introduces the presence of a radioactive element(which produces radiation ) where it occurs it is different from a nuclear disaster as a nuclear disaster require a nuclear explosion to produce radiation.

hi there!

your question asks at which segment does freezing occur.

since we're talking about water, the freezing point of water will be 32 degrees fahrenheit or below.

hope this ! ~

the answer would be   dignified - apex