Notion sets your emergency numbers based on your system to location.
To reset your emergency numbers, you'll need to reset your location in the Notion app. To do this, select the visit account settings (person icon in the menu) > visit the systems tab > select your system name > click the edit button near the top right > click current location > use approximately the location of your house > save.
This should update your emergency numbers to the correct ones. If this doesn't do it, please use 911 for now. We are working on the ability for users to manually update their emergency numbers.