alarm
background
caution
chemical
color
concrete
container
copy
danger
emergency
equipment
extinguish
extinguisher
fire
flame
foam
grey
grunge
handle
hang
heat
help
hose
hydrant
illustration
industrial
metal
new
object
orange
powder
pressure
protection
red
rescue
safe
safety
security
services
sign
smoke
space
spray
tank
tool
wall
warning
water
white