Are people who live in extremely hot regions obliged to fast even though it is difficult for them?

In the Sahara region, the month of Ramadan may come in the summer and
it is difficult for them to fast and it may be impossible for them.
This will continue for a number of years. How should these people
fast?.
Praise be to Allaah.
When the month of Ramadan begins, every Muslim who is accountable, not
travelling and in good health is obliged to fast. Allah says
(interpretation of the meaning):
"So whoever of you sights(the crescent on the first night of) the
month (of Ramadan i.e. is present at his home), he must observe Sawm
(fasts) thatmonth, and whoever is ill or on a journey, the same number
[of days which one did not observe Sawm (fasts) must be made up] from
other days"
[al-Baqarah 2:185].
So fasting is obligatory even at times when it is hot, because fasting
Ramadan is one of the pillars of Islam. If a personfasts and then
suffers intense thirst in which there is the fear that he may die, he
may break the fast by drinking enough to keep him alive,then he should
refrain from eating and drinking, and make up that day at another
time. And Allah knows best.
And Allah is the source of strength. May Allah send blessings and
peace upon our Prophet Muhammad and his family and Companions. End
quote.
Standing Committee for Academic Research and Issuing Fatwas
Shaykh 'Abd al-'Azeez ibn 'Abd-Allaah ibn Baaz, Shaykh 'Abd-Allaah ibn
Ghadyaan, Shaykh Saalih al-Fawzaan, Shaykh 'Abd al-'Azeez Aal
al-Shaykh, Shaykh Bakr Abu Zayd
Fataawa al-Lajnah al-Daa'imah – vol. 2, 9/145.

Is it sufficient to drink water for sahoor?

Can we call it sahoor if onelimits oneself to drinking water only?.
Praise be to Allaah.
It seems that it can be called sahoor, if one cannot find food,
because of the hadeeth: "When oneof you breaks the fast, let him break
it with fresh dates, and if he cannot findany then with dry dates, and
if he cannot, then witha few sips of water." If a person does not have
any food available, or he has food but he does not wantto eat it so he
drinks water, then I hope that this will count as followingthe Sunnah.
End quote.
Shaykh Muhammad ibn 'Uthaymeen (may Allaah have mercy on him).
Fataawa Noor 'ala al-Darb

Who is the fasting person for whom the Muslim will be rewardedfor giving him food to break his fast with?

Is the fasting person who the Messenger (blessings and peace of Allah
be upon him) encouraged us to give him food to break his fast with the
poor person who is fasting, or one who is a stranger in the land, or
the one whom we invite to break the fast with us at home, such as a
guest who is part of the family or a relative? Can we attain the
reward by offering food for breaking the fast to fasting people to
whom we give a private invitation during Ramadan?.
Praise be to Allaah.
It is proven that the Prophet (blessings and peace of Allah be upon
him) said: "Whoever givesfood to a fasting person with which to break
his fast will have a reward like his without detractingfrom the reward
of the fasting person in the slightest."
Narrated by al-Tirmidhi, 807
What is meant by the fasting person here is any Muslim who is fasting,
especially those who are deserving of charity, such as the poor,
needy, and wayfarers. This is similar to the words of the Prophet
(blessings and peace of Allah be upon him): "Whoever equips a fighter
for the sake of Allah has gone out on campaign (i.e., will have the
reward of going out on campaign)."
Narrated by al-Bukhaari, 2843.
And Allah is the source of strength. May Allah send blessings and
peace upon our Prophet Muhammad and his family and Companions. End
quote .
Standing Committee fir Academic Research and Issuing Fatwas
Fataawa al-Lajnah al-Daa'imah (vol. 2), 9/33

And Allah knows best.

1a] The guidance of the Prophet (peace and blessings of Allaah be upon him) regarding i’tikaaf

1a]
This was stated by al-Shawkaani in Nayl al-Awtaar.
Some of his wives used tovisit him when he was in i'tikaaf. When she
stood up to leave, he would take her home – that was at night.
It was narrated from Safiyyah the wife of the Prophet (peace and
blessings of Allaah be upon him) that she came to the Messenger of
Allaah(peace and blessings of Allaah be upon him) and visited him when
he was in i'tikaaf in the mosque, during the last ten days ofRamadaan.
She spoke with him for a while, thenshe stood up to leave. TheProphet
(peace and blessings of Allaah be upon him) stood up with her to take
her home. Narrated by al-Bukhaari, 2035; Muslim, 2175.
In conclusion, his i'tikaaf was moderate and not harsh. He spent all
his time remembering Allaah and turning to Him in worship, seeking
Laylat al-Qadr.