Naperville residents can now text 911 in an emergency. Here’s what you need to know.

Text-to-911 is also available in areas served by the Northwest Central Dispatch System, which include Arlington Heights, Buffalo Grove, Elk Grove Village, Hoffman Estates, Inverness, Mount Prospect, Palatine, Prospect Heights, Rolling Meadows, Schaumburg and Streamwood. According to executive director John Ferraro, AT&T, T-Mobile/Sprint and Verizon all allow for text-to-911 in the system’s service area.