A combination of steep terrain, shallow soil and a moisture-laden weather system that stalled over the Texas Hill Country caused the flash floods that killed at least 79 people Friday. The weather system that caused the flooding was fueled by moist air from the coastal plain that swept up the Hill Country’s steep cliffs,

Texans were caught with deadly rising waters in the middle of the night, leaving many to question the forecast and the alerts. Here’s a look at the timeline.

Beast reported that while rescue teams searched floodwaters in Texas that Cruz remained in Greece, continuing to sightsee.

"The agony that Texas is feeling right now…there aren't words to describe," Cruz told CBS News Texas on Monday.

Flash flooding is common in Texas and can happen in the event of heavy rainfall, according to the National Weather Service Fort Worth. Here’s a few tips on how to prepare for flooding, what to do during and what areas in North Texas are the most flood-prone.