If he wakes up late and the water is cold, can he do tayammum?

Question

Praise be to Allah.

If a person has an erotic dream and emits maniy (semen), he
has to do ghusl so that he can pray, and it is not permissible for him to do
tayammum instead unless there is no water available or he fears that he may
be harmed as a result of using it, because Allaah says (interpretation of
the meaning):

“O you who believe! When you intend to offer As-Salaah
(the prayer), wash your faces and your hands (forearms) up to the elbows,
rub (by passing wet hands over) your heads, and (wash) your feet up to the
ankles. If you are in a state of Janaaba (i.e. after a sexual discharge),
purify yourselves (bathe your whole body). But if you are ill or on a
journey, or any of you comes after answering the call of nature, or you have
been in contact with women (i.e. sexual intercourse), and you find no water,
then perform Tayammum with clean earth and rub therewith your faces and
hands”

[al-Maa’idah 5:6]

And the Prophet (peace and blessings of Allaah be upon
him) said: “Clean earth is the wudoo’ of the Muslim even if he cannot find
water for ten years, but if he can find water, then he should fear Allaah
and let it touch his skin, for that is better.” Narrated by al-Bazzaar, and
classed as saheeh by al-Albaani in Saheeh al-Jaami’, no. 3861.

If a person wakes up junub and is afraid that he will be
harmed by using water because the weather is cold, and he can heat the
water, he must do that, even if the time for the prayer ends, because the
sleeper is excused, and the time for him is when he woke up, so prayer is
binding for him, along with whatever is required of purification.

But if he has no means of heating the water, it is
permissible for him to do tayammum in that case.

Fear of being late for work is not regarded as an excuse that
makes it permissible not to do ghusl and to do tayammum instead.

The one who does tayammum with no excuse that makes tayammum
permissible has to repeat the prayers that he offered with that tayammum, so
that he will discharge his duty.

The Standing Committee for Issuing Fatwas was asked: If it is
very, very cold and the water in the vessel or jug is freezing, and the
person has become junub, for example, and the water will affect him and give
him a fever, then what should he do?

They replied:

If the matter is as described, then he may do tayammum.
Allaah says (interpretation of the meaning):

“But if you are ill or on a journey, or any of you comes
after answering the call of nature, or you have been in contact with women
(i.e. sexual intercourse), and you find no water, then perform Tayammum with
clean earth and rub therewith your faces and hands”

[al-Maa’idah 5:6]

But if it is possible to heat it with fire and the like, then
he must do ghusl, because Allaah says (interpretation of the meaning):

“So keep your duty to Allaah and fear Him as much as you
can”

[al-Taghaabun 64:16]

End quote.

And Allaah knows best.