Brood of the Witch-Queen by Sax Rohmer — Read

This sudden and appalling change of weather had sadly affected the mood of the gathering. That part of the carnival planned to take place in the garden was perforce abandoned, together with the firework display. A halfhearted attempt was made at dancing, but the howling of the wind, and the omnipresent dust, perpetually reminded the pleasure-seekers that khamsin raged without -- raged with a violence unparalleled in the experience of the oldest residents. This was a full-fledged sandstorm, a terror of the Sahara descended upon Cairo.

But there were few departures, although many of the visitors who had long distances to go, especially those from Mena House, discussed the advisability of leaving before this unique storm should have grown even worse. The general tendency, though, was markedly gregarious; safety seemed to be with the crowd, amid the gaiety, where music and laughter were, rather than in the sand-swept streets.