Damn, sounds rough. Have you been stressing alot in real life lately? Disaster in dreams can mean your fear for the future or relenting something in the future, it can also mean you are overworked with too many tasks and stress at the moment. On the other hand these kinds of dreams can also resemble growth and change from your current self where as Zombies may mean you feel you need to break free from routine and begin a new fresh life, it may also mean your negative thoughts are currently draining the life from you.