下达紧急任务怎么说英语

To issue an urgent task in Engpsh, you might say something pke:

"I need you to take on an urgent task immediately. Please prioritize this above all other tasks and let me know as soon as it's completed."

or

"We have an emergency situation and I need you to handle it right away. This is top priority, so please drop everything else and focus on this task."