1. Stop the accident – prevent it from escalating.
2. Provide immediate life saving aid.
3. Call for assistance – ambulance, firefighters.
4. Provide general first aid.
In the case of Europe being the injured, the four main steps could be rephrased:
1. Close the borders.
2. Establish a Ministry for Repatriation.
3. Call in the military to help the police.
4. Re-define your country’s immigration policies – make them up-to-date.
That should do the trick!