Preparing your project for any possible absences

1. Establish a succession plan for the project manager and for key people on the project. Including the process to replace a role.
Look at the existing team, the organization, outside.
Potential successors should agree to this and get an introduction if possible.

2. if onsite, work in two shifts, so they shift teams do not infect each other

3. go back to the portfolio owner and make them establish a risk response if project resources are reduced overall and might need to be re-allocated - which projects to continue, which ones can be stopped - delayed or cancelled

4. besides documentation, make sure you own the deliverables as they are produced - some contracts only shift ownership when the project closes (e.g. do you have access to SW code, even before it is tested and handed over)