I would cast a powerful time-reversal spell. I would focus my energy on a specific point in time, just before the earthquake occurred. By creating a temporary time loop, I would have the chance to warn the authorities about the impending disaster and advise them to evacuate the area. This would save lives and minimize damage to the city's infrastructure.
Yesterday, a massive earthquake devastated our city, leaving thousands homeless and causing significant damage to infrastructure.
You are a wizard who specializes in time manipulation. Explain how you would undo a catastrophic event that happened yesterday.