The ruling on tayammum (dry ablution with clean earth) in severe cold when water is available, if one fears harm to oneself

Question:
May Allah reward you and make your knowledge beneficial to the listeners. Adnan al-Futuh from Syria, residing in the Kingdom, sent a message saying: I have several questions. The first is: Honorable Shaykh, I am currently residing in Saudi Arabia, and my profession is tending sheep. In the winter, the cold is sometimes severe. I wake up in a state of janabah (major ritual impurity) from wet dreams, so I perform tayammum with dust, even though I have water, but the water is cold due to the extreme cold of the weather. Sometimes I pray Fajr (the dawn prayer) with tayammum using dust. Is tayammum with dust permissible when I have water, or not? Please give us a ruling. May Allah reward you with good.

Answer:
If the situation is as you described, with the water being so cold that you cannot bear it or you fear harm from its effect, then if you have fuel to heat the water, it is obligatory for you to do so, and tayammum is not sufficient for you. Rather, you must heat the water until you are able to use it for purification, because you are capable of using it in this situation, and tayammum is not sufficient for you. However, if you do not have anything to heat the water with and you fear harm to yourself, then you perform tayammum with dust and pray, and your prayer is valid, because you are unable to use the water in this situation. Yes.