How could such an extremely hazardous organism be allowed to escape?

The security situation in many rural areas is extremely hazardous.

The occupation is extremely hazardous, and people have to know what they're doing.

Severe winter weather can also make the road extremely hazardous.

However, by Sunday evening it became clear conditions in the pit had become extremely hazardous.

The chemicals are considered extremely hazardous in a concentration of 1,000 parts per million, he said.

Drugs prescribed by doctors can be extremely hazardous if used in the wrong way.

The park may be closed on windy days during the dry season due to extremely hazardous fire conditions.

When there is snow on the mountain, it can become extremely hazardous to hike.

On 20 March, after 19 days of extremely hazardous operation, the task was completed.