alarm
alert
area
atomic
attention
button
caution
chemical
color
danger
dangerous
design
element
energy
explosive
fiery
fire
flame
flammable
flat
gas
hazard
hazardous
heat
high
icon
ignite
illustration
industrial
industry
inferno
isolated
label
power
red
risk
safe
safety
security
sign
single
stencil
sticker
symbol
ui
warning
white
zone