The article talks about why cities continue to use sandbags, (the bags are cheap and voluteers are free, and in Fort Wayne's case we get the bags free from FEMA) and notes a couple of alternatives to sandbags, such as the Rapid Deployment Wall and the Portadam.
The Portadam and the Rapid Deployment Wall work better than sandbags under lab conditions, and are less labor intensive. People are usually happy to help out with sandbagging, but suppose we have a flood at 3am when only Hillary Clinton will answer the phone?* Also, these devices could make floodprone area habitable again so as long as businesses and homes that choose to locate in those area have their own flood control equipment available.
*Sorry, the joke is already dated but I couldn't resist.