The downpours that swept away a children's summer camp and wreaked deadly havoc on huge areas of Texas caught holidaymakers by surprise. As the death toll passes 90 people, questions are being raised about whether adequate flood warnings were provided and why people weren't evacuated ahead of the deluge.

Here’s what to know about the deadly flooding, the colossal weather system that drove it in and around Kerr County, Texas, and ongoing efforts to identify victims.

Before and after satellite images from Texas show the effects of the devastating flooding that occurred along the Guadalupe River on July 4.

And yet, what happened in the early hours on Friday, when catastrophic flooding struck with a surge topping 20 feet, soon became a perfect storm turned into a once-in-a-lifetime tragedy. I first heard about the flood on Friday morning,