When should those living in tall buildings break their fast?
Question

                If a person lives in Burj Khalifa in Dubai, which is 160 storeys high, should he break his fast at the time of the adhaan for Maghrib in the city, or what should he do?
Praise be to Allah.
      Firstly: 

    Islam has given a very clear sign for the end of the fast, which is the 
    setting of the sun beyond the horizon. Once the sun has set, it is 
    permissible for the fasting person to break his fast, because Allah, may He 
    be exalted, says (interpretation of the meaning): “then 
    complete your Saum (fast) till the nightfall” 
    [al-Baqarah 2:187]. 

    The night begins when the sun sets, as has been explained in the answer to 
    question no. 110407. The Prophet (blessings and peace of Allah be upon him) 
    said: “When the night comes 
    from here (meaning from the east) and the day departs from here (meaning 
    from the west), and the sun sets, then it is time for the fasting person to 
    break his fast.”

    Narrated by al-Bukhaari (1954) and Muslim (1100) 

    An-Nawawi said: The fast ends and is completed with the setting of the sun, 
    according to the consensus of the Muslims.

    End quote from Majmoo‘ Sharh al-Muhadhdhab (6/304) 

    What is meant by sunset is when the entire disc of the sun disappears below 
    the horizon. There is no significance attached to the redness that remains 
    on the horizon. When the entire disc has disappeared, it becomes permissible 
    to break the fast. 

    Al-Haafiz Ibn Rajab (may Allah have mercy on him) said: 

    This hadith indicates that that the mere disappearance of the disc ushers in 
    the time for Maghrib prayer, and the time for the fasting person to end his 
    fast. This is the matter of consensus among the scholars, as was reported by 
    Ibn al-Mundhir and others. 

    Our companions, and the Shaafa‘is and others, said: There  is no 
    significance attached to the deep redness that remains in the sky after the 
    disc of the sun has set and disappeared from view. 

    End quote from Fath al-Baari (4/352) 

    Shaykh al-Islam Ibn Taymiyah said:

    Once the disc of the sun has set, at that point the fasting person breaks 
    his fast, as the time during which it has been prohibited to eat and drink 
    has now ended. The deep redness that remains on the horizon does not have 
    any impact on any of the rulings. 

    End quote from Sharh ‘Umdat al-Fiqh (p. 169) 

    Secondly: it is well-known that the setting of the sun varies from one place 
    to another, and from one city to another. Likewise, it may vary in a single 
    location depending on whether one is in a low or high place.
As 
    Islamic teaching has connected the time of breaking the fast to the 
    disappearance of the disc of the sun, each person has his own ruling, 
    according to the place where he is at the moment of sunset. So he should not 
    break his fast until the sun has set relative to the place in which he is, 
    whether it has set in another place or not. So a person who lives in a high 
    tower should not break his fast, even if the sun has set for those who are 
    at ground level, until it disappears from the horizon as he sees it. 

    Fakhr ad-Deen ar-Raazi said: It was narrated that Abu Moosa ad-Dareer al-Faqeeh, 
    the author of al-Mukhtasar, came to Alexandria and was asked about 
    one who climbs up the minaret of Alexandria and sees the sun a long time 
    after it has set for the people in the city; is it permissible for him to 
    break his fast? 
He 
    said: No, but it is permissible for the people in the city, because each of 
    them is required to follow the teachings in relation to his own situation. 

    End quote from Tabyeen al-Haqaa’iq (1/321) 

    Ibn ‘Aabideen said: It says in al-Fayd: One who is in a high place, 
    such as the minaret of Alexandria, should not break his fast so long as the 
    sun has not yet set from where he is looking, but the people of the city may 
    break the fast if the sun has set before that from where they are. The same 
    applies with regard to dawn in the case of Fajr prayer and sahoor.

    End quote from Haashiyat Ibn ‘Aabideen (2/420) 

    Muhammad Anwar Shah al-Kashmiri said: In the books of fiqh it is reported 
    that there were two men, one of whom was at the top of a minaret and could 
    see the sun, and the other was at ground level and the sun had set from 
    where he was looking. It is valid for the latter to break the fast, but not 
    the former.

    End quote from Fayd al-Qadeer (3/355) 
In
    Fataawa al-Lajnah ad-Daa’imah (10/297) it says:

    Each fasting person is subject to the ruling on the place in which he is, 
    whether he is at ground level or in an airplane in the sky. End quote. 

    Shaykh Ibn ‘Uthaymeen (may Allah have mercy on him) said:

    People who are on mountain tops or in valleys or in high buildings, each of 
    them has his own ruling. The one for whom the sun has set is permitted to 
    break the fast, but the one for whom it has not set is not permitted to do 
    so.

    End quote from ash-Sharh al-Mumti‘ (6/398) 

    And he said:
If 
    the mu’adhdhin gives the call to prayer but you are in a high place and can 
    still see the sun, then you should not break the fast.

    End quote from al-Liqa’ ash-Shahri (41/22) 

    The same applies for passengers on board a plane: they should not break the 
    fast until the sun has set from where they are looking. 

    The scholars of the Standing Committee said:
If 
    a fasting person is on board a plane and he can see from his watch or cell 
    phone that a nearby country has now broken the fast, but he can see the sun 
    because of the altitude of the plane, then he does not have the right to 
    break his fast, because Allah, may He be exalted, says (interpretation of 
    the meaning): “then 
    complete your Saum (fast) till the nightfall” 
    [al-Baqarah 2:187]. And 
    this has not been fulfilled in his case, so long as he can still see the 
    sun. 

    End quote from Fataawa al-Lajnah ad-Daa’imah (10/137) 

    Shaykh Ibn ‘Uthaymeen was asked: In the month of Ramadan, we may be on a 
    journey and we fast during the journey, then night comes when we are still 
    in the air. Should we break the fast when we see the disc of the sun 
    disappear from in front of us, or should we break the fast according to the 
    timetable of the people of the city over which we are flying? 
He 
    replied: Break the fast when you see that the sun has set, because the 
    Prophet (blessings and peace of Allah be upon him) said: “When the night 
    comes from here and the sun sets, then it is time for the fasting person to 
    break his fast.” 

    End quote from Majmoo‘ Fataawa wa Rasaa’il al-‘Uthaymeen (15/437) 

    Please see also the answer to question no. 106475
To 
    sum up: 

    Those who live in high buildings should pay attention to the differences in 
    time between sunset at ground level and in the place where they are. 

    The Department of Issuing Fatwas and Islamic Affairs in Dubai has explained 
    that the residents of Burj Khalifa, which is 160 storeys high, are required 
    to delay breaking the fast in the month of Ramadan, and those residents who 
    live on floors 80 to 150 are required to break the fast two minutes after 
    the time of the adhaan for Maghrib prayer. 

    For those residents who live on floor 150 and above, the time for the adhaan 
    of Maghrib and ‘Isha’ prayers is three minutes later. 

    For those residents who live on floors lower than the eightieth floor, they 
    may break their fast according to the time of the adhaan for Maghrib in the 
    mosques. 

    Please see the following link: 


    
    http://www.emaratalyoum.com/local-section/other/2011-08-06-1.414355

    or 


    http://www.aleqt.com/2011/08/06/article_566738.html

    And Allah knows best.