Question: I request from Your Eminence a Fatwaa (legal opinion issued by a qualified Muslim scholar) on Iftaar (breaking the Fast) in Ramadaan. I work in a bakery in front of the oven and I cannot bear the extreme heat of the fire. I observed Sawm (Fast) last year because I did not work in Ramadaan. In-shaa’-Allaah (if Allaah wills), I must observe Sawm this year.
Answer: You must observe Sawm. Allaah (Exalted be He) states: So whoever of you sights (the crescent on the first night of) the month (of Ramadaan i.e. is present at his home), he must observe Sawm (fasts) that month... read more here.