Per their career site, the Canadian Red Cross stresses to potential applicants that the frontline work environment can be demanding and stressful. Ask yourself if you have the mental and physical health to handle the job and if you practice good diet, exercise, and sleeping habits. As you discuss your ability to manage stress on the job, these are great tactics to start with. Beyond that, make sure to talk about times when you faced a high workload or demanding tasks and how you used your organizational and communication skills to handle the tasks accurately and efficiently.