Emergencies may arise at any given time so it is best to keep these emergency numbers handy in case they might be of use, especially if you're an expat who is just moving to Saigon.
Emergency Rescue: 112
Police: 113
Fire: 114
Ambulance: 115
Emergency hotline for foreigners: 1087
(English speaking)
For information on living in Saigon go to Saigon: Not Yet a Tourism Hub