Given proper refrigeration of the meat, proper cooking, and consuming it directly off the grill, it SHOULD be fine regardless of the temperature.
Then again, we're talking about Arab standards of cleanliness and food preparation...
In theory, they use their left hands in lieu of toilet paper, and wash those left hands thoroughly. In practice, I suspect those nails are not kept as short as they should be, especially in the food prep biz, and washing is less than thorough. Since one-handed food prep is impractical, it's pretty clear why eating street food in those regions is highly risky, especially given the typical lack of nearby toilet facilities.