Holly Hartman, a journalism teacher for 22 years, writes an incredible story: After watching nonstop coverage of the hurricane and the incredible rescues that were taking place, I got in bed at 10:30 on Tuesday night. I had been glued to the TV for days. I read an article about the Cajun Navy and the thousands of selfless volunteers who have shown up to this city en masse. The article explained they were using a walkie-talkie-type app called Zello to communicate with each other, locate victims, get directions, etc. I downloaded the app, found the Cajun Navy channel and started listening. I was completely enthralled. Voice after voice after voice coming though my phone in the dark, some asking for help, some saying they were on their way. Most of the transmissions I was hearing when I first tuned in were from Houston, but within 30 minutes or so, calls started coming in from Port Arthur and Orange. Harvey had moved east from Houston and was pummeling East Texas. Call after call from citizens saying they were trapped in their houses and needed boat rescue. None of the volunteer rescuers had made it to that area from Houston, but as soon as the calls started coming in, they were moving out, driving as fast as they could into the middle of Harvey.