It would indeed, but it is most unlikely. Haemorrhagic fever viruses cannot tolerate direct sunlight for more than a few minutes, and require moisture to replicate. One thing to note: IF Mecca (say) or some other city with similar weather conditions, specifically, hot, sunny and dry, should see such an outbreak, you can very confidently wager that 1) the outbreak was induced and did not occur via natural transmission and 2) absent the invention of a vaccine or a cure, you will quite soon have a pandemic on your hands.
Fortunately, as yet, none of the idiots running the world have been able to weaponise this class of viruses.