California officials have lifted the final remaining evacuation orders in Orange County after securing a chemical tank leak, allowing Garden Grove residents to return to their homes after a week of nerves over the possibility of a spill or explosion.

About 50,000 Orange County residents were initially evacuated last week when the pressurized tank at an aerospace facility began overheating and leaking a toxic chemical, pushing emergency responders to clear the area to stabilize the leak. After progress in the emergency response over the weekend, officials condensed the evacuation zone and allowed about 30,000 people to return home on Monday. On Tuesday evening, officials allowed all residents to return.