During a power outage in an apartment building, it is important to prioritize safety by preparing emergency supplies such as flashlights, batteries, and non-perishable food items. Staying safe involves avoiding using candles or other open flames, as well as unplugging electronics to prevent power surges when the electricity comes back on. It is also important to communicate with other residents and follow any instructions or guidelines provided by the building management. If the outage lasts for an extended period of time, it may be necessary to seek alternative shelter or arrange for backup power sources. Overall, staying calm and informed can help to ensure the safety and well-being of everyone in the building during a power outage.