Torrential rains and "catastrophic" flash flooding that hit central Texas over the holiday weekend have left more than 100 people dead, including dozens of children. Forecasts and alerts from the National Weather Service projected heavy rainfall,

As the deadly floodwaters in parts of central Texas recede, there are growing questions about how the catastrophic rainfall seemingly caught the area by surprise. Some local officials say the National Weather Service underestimated the extreme rain but the agency says an initial flood watch was issued Thursday afternoon.