1. Al Arabiya English (2016), “Hajj safety: Saudi Arabia introduces hi-tech bracelets for all pilgrims”, July 1, available at: http://english.alarabiya.net/en/life-style/travel-and-tourism/2016/07/01/Hajj-safety-Saudi-Arabia-introduces-hi-tech-bracelets-for-all-pilgrims.html (accessed October 16, 2017).
2. Al Nabulsi, H. (2015), “The crowd psychology of the Hajj”, Doctoral dissertation, University of Sussex, Brighton.
3. Arab News (2016), “30% increase in Umrah pilgrims seen by 2020”, June 9, available at: www.arabnews.com/node/936801/saudi-arabia (accessed August 7, 2017).
4. How do you warn them if they speak only Spanish? Challenges for organizations in communicating risk to Colonias residents in Texas, USA;Disaster Prevention and Management,2014
5. Eurostat Statistics Explained (n.d.), “Internet access and use statistics – households and individuals”, available at: http://ec.europa.eu/eurostat/statistics-explained/index.php/Internet_access_and_use_statistics_-_households_and_individuals (accessed August 26, 2017).