alarm
alert
background
bell
box
break
bright
button
danger
detector
emergency
equipment
evacuation
extinguish
fire
fire alarm
glass
hand
house
icon
information
isolated
key
keyhole
loud
metal
office
press
protection
pull
push
red
rescue
ring
safe
safety
school
security
sign
sound
sprinkler
switch
symbol
system
urgency
warning