Reference: Fataawa al-Lajnah ad-Daa.imah lil-Buhooth al-‘Ilmiyyah wal-Iftaa. – Fatwa No. 11803
Fataawa Ramadhaan – Volume 1, Page 188, Fatwa No.128
Question: If a person is fasting during Ramadhaan and is travelling to another country and he does not have anything except water, what does he do?
Response: If a person is fasting and the sun sets and he does not find anything to break his fast with except water, then he should break his fast with the water because breaking the fast with fresh or dried dates is preferable but not obligatory.
And with Allaah lies all the success, and may Allaah send prayers and salutations upon our Prophet Muhammad ﷺ and his family and his companions.