Last weekend, the United States’ 4th of July holiday weekend, the remnants of a tropical system inundated a central Texas river valley with months’ worth of rain in just a few short hours. The result? The tragic loss of over 100 lives (and authorities are still searching for missing people).
Debate rages about why the casualties ranked so high—the gutting of the National Weather Service by the administration shines brightly—but the natural causes of the disaster are easier to identify. And the BBC did a great job covering those in a lengthy article with a number of helpful graphics.
I will start with this precipitation map, created with National Oceanic and Atmospheric Administration (NOAA) data.

I remain less than fully enthusiastic about continual gradients for map colouration schemes, however the extreme volume of rainfall during the weather event makes the location of the flooding obvious to all. Nonetheless the designers annotated the map, pointing out river, the camp at the centre of the tragedy and the county wherein most of the deaths occurred.
In short, more than 12 inches of rain fell in less than 24 hours. The article also uses a time lapse video to show the river’s flash flooding when it rose a number of feet in less than half an hour.
The article uses the captivating footage of the flash flooding as the lead graphic component. And I get it. The footage is shocking. And you want to get those sweet, sweet engagement clicks and views. But from the standpoint of the overall narrative structure of the piece, I wonder if starting with the result works best.
Rather, the extreme rainfall and geographic features of the river valley contributed at the most fundamental level and showcasing that information and data, such as in the above map, would be a better place to start. The endpoint or culmination of the contributing factors is the flash flooding and the annotated photo of flood water heights inside the cabins of the camp.
Overall I enjoyed the piece tremendously and walked away better informed. I had visited an area 80 miles east of the floods several years ago for a wedding. Coincidentally on the 4th I remarked to a different friend from the area now living in Philadelphia about the flatness and barrenness of the landscape between Austin and San Antonio. I had no idea that just to the west rivers cut through the elevated terrain that would together cause over a hundred deaths a few hours later.
Credit for the piece goes to the BBC, but the article listed a healthy number of contributors whom I shall paste here: Writing by Gary O’Donoghue in Kerr County, Texas, Matt Taylor of BBC Weather and Malu Cursino. Edited by Tom Geoghegan. Images: Reuters/Evan Garcia, Brandon Bell, Dustin Safranek/EPA/Shutterstock, Camp Mystic, Jim Vondruska, Ronaldo Schemidt/AFP and Getty.