'Heat' in the Bible

saying, 'These last have spent one hour, and you have made them equal to us, who have borne the burden of the day and the scorching heat!'

When a south wind blows, you say, 'There will be a scorching heat,' and it happens.

But when Paul had gathered a bundle of sticks and laid them on the fire, a viper came out because of the heat, and fastened on his hand.

But the day of the Lord will come as a thief in the night; in which the heavens will pass away with a great noise, and the elements will be dissolved with fervent heat, and the earth and the works that are in it will be burned up.

looking for and earnestly desiring the coming of the day of God, which will cause the burning heavens to be dissolved, and the elements will melt with fervent heat?

They will never be hungry, neither thirsty any more; neither will the sun beat on them, nor any heat;

People were scorched with great heat, and people blasphemed the name of God who has the power over these plagues. They didn't repent and give him glory.