accident
alarm
alert
attention
beware
cable
caution
countryside
danger
dangerous
death
electric
electrical
electricity
electrocution
energy
flash
hazard
high
hill
industry
information
lightning
line
lines
mast
notification
overhead
photo
power
precaution
prevention
protection
pylon
risk
safety
scotland
security
shock
sign
signboard
symbol
trees
triangle
volt
voltage
warning
yellow