The eastern half of the United States has the oldest infrastructure in the nation. One glitch can cause major problems, just like this event, water main break in Fort Lauderdale.
Without water, people don't have it to drink. Toilets won't flush and IT centers need the water for cooling. Hundreds of thousands of gallons a day are evaporated at individual centers.
We'll have to see how everything holds up with the heat test. And, this is early in the year. August is a hotter month with more humidity. You might want to dust off your heat emergency plans!