https://www.cnet.com/news/mobile-phones-as-lifelines-tips-for-staying-connected-during-a-disaster/

As flood waters rose last weekend, victims of Hurricane Harvey didn't just overwhelm 911 call centers seeking help. They also took to social media sites like Twitter and Facebook to ask for assistance, update loved ones and seek information.

It makes sense, says University of Kentucky assistant professor Jeannette Sutton, who studies communication and the use of social media during disasters.