If one fears the time will expire if the water is heated during severe cold, does he perform tayammum?

Question:
May Allah reward you, Honorable Shaykh. This questioner says: If a man wakes up from sleep and the cold is severe, and he has water and a heating device, but if he heats the water the time will expire, does he proceed with heating it even if the time expires, or does he switch from using water to tayammum and pray before the time expires?

Answer:
They mentioned that it is not permissible to delay the prayer beyond its time except in two cases. The first case is the one who intends to combine prayers; he intends to combine the first with the second and delays it. The second case is if he fears the time of the current prayer will expire.
If he fears the time of the current prayer will expire, he prays it with tayammum. This is the correct opinion among the scholars, and it is the school of thought. They say: If it is possible to obtain purity in a short time, he should proceed with it even if the time expires, except for the one who intends to combine prayers and is engaged in a condition that he will obtain shortly. However, if it will take a long time, no; he should pray. Heating the water is a minor matter, there is no harm in it; he heats the water and performs wudu'.