More than a hundred people died because of devastating flash floods in Texas earlier this month. It’s important to understand how floods happen, and what we can do to keep ourselves safe. Ali Velshi speaks with Jim Blackburn,

Floodwaters be contaminated with debris as well as high levels of bacteria, chemicals, waste and other pollutants, which can cause prolonged health risks, experts say.

The camp where 27 girls died successfully challenged initial risk designations by US regulators, according to reports.