Abbot said many of those who are not accounted for were staying in state’s Hill Country but did not register at a camp or hotel. He spoke at a news conference after taking a helicopter tour of the affected area.

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.