It was nasty hot . I am sitting in the cool comfort of my parents ' living room . I caved and came over here to get out of the heat .

Question: What do I mean when I say the weather is " nasty hot " ?
Answer: None of the above choices .The weather is nice now but will turn out to be nasty later .The weather hateful because it is hot one minute and freezing the next .The heat is just unbearably dreadful outside .