Plant closing and notice period questions - first time posting

I received a formal notice about a mass layoff at my workplace. I have read a lot of threads here and could not find my exact situation. Some colleagues are already leaving. Should I stay for the bonus?

Write down key dates and keep copies of the notice. Mine helped when a question came up later.

The workforce board ran a rapid-response session for us with résumé help and information on benefits. Ask if yours will.