What is the reason he was late?

I couldn't understand his actions.

He started to act immediately.

In order to resolve this situation, everyone's cooperation is necessary.

We would like all citizens to cooperate with this plan.

The state control in response to the emergency has been strengthened.

The government began to control the actions of citizens on the grounds of an emergency.

This is an urgent problem.

An emergency has occurred, so please take action immediately.

I decided to start a new project.