911
accident
alarm
ambulance
black
calamity
call
caution
contact
danger
dial
difficulty
disaster
disinfect
distress
emergency
engine
exit
fire
firefighter
giving
health
help
hospital
icon
isolated
lesson
number
phone
precaution
prevention
protection
rescue
safety
security
simple
siren
sos
support
technology
telephone
transport
truck
urgency
video
warning
welfare