It was raining in the Sinai in the early morning hours of Sunday night. While the rain in Sharm was moderate, other parts saw heavy thunderstorms. 
On Monday the roads from Cairo to Sharm and from Sharm to Dahab were closed due to heavy damages. Dahab was effected even more, as there was neither internet nor telephone since the night.
By the late afternoon all was back to normal in Dahab while the streets remained closed.