alarm
alert
ambulance
arrest
attention
background
beacon
black
blue
brigade
bulb
car
caution
danger
design
element
emergency
equipment
extinguisher
fire
fireman
flame
flashing
flat
glowing
hose
icon
illuminate
illustration
interface
isolated
light
medical
police
protection
red
rescue
safety
security
set
sign
signal
siren
symbol
traffic
urgency
vehicle
warning
white