Officials on both sides described the violence, which has intensified rapidly over the past two weeks, as war.

Early on September 17, the storm began to rapidly intensify.

In the early Spring of 1944, resistance operations intensified rapidly.

It rapidly intensified, becoming a major hurricane on two occasions.

The storm then rapidly intensified and became a Category 1 hurricane later that day.

The low pressure area rapidly intensified and became a tropical storm 4 days after formation.

The system rapidly intensified and became the fourth tropical depression of the season on the same afternoon.

At the same time, the Sunni insurgency was rapidly intensifying.

Jova rapidly intensified, and developed an eye late on September 15.

The depression rapidly intensified, becoming a tropical storm within six hours.