In the early hours of Independence Day, rain pelted sleeping communities in central Texas. No one knew yet how devastating the storm would become.

Here's what we know so far on the Texas flash floods, including where the flooding is happening, when storms could end and what could happen next.

A flood watch issued for parts of Texas has been extended into Monday evening, leaving thousands at risk. The National Weather Service San Angelo office said on Sunday that flash flooding caused by excessive rainfall could occur in Heartland, portions of Concho Valley, Edwards Plateau and Hill Country until 7:00 p.m. on Monday.