浜辺
alarm
alert
attention
background
beware
caution
communication
connection
danger
dangerous
destruction
disaster
earthquake
electricity
emergency
environment
equipment
evacuate
evacuation
hazard
information
landslide
loudspeaker
megaphone
monitor
noise
notice
ocean
pole
post
protection
restricted
safety
sea
sign
siren
sky
solar cell
speaker
surround
system
technology
tower
tsunami
warning
water
wave
weather
wireless