alarm
arrow
art
background
building
business
caution
color
colorful
danger
design
emergency
escape
evacuate
evacuation
exit
fire
firefighting
flame
forbidden
graphic
hazard
icon
illustration
infographic
isolated
label
pictogram
plan
prohibited
prohibition
protection
rescue
risk
safe
safety
sign
staircase
stairs
stairway
step
stop
symbol
up
wall
warning