advice alert appropriate-behavior appropriate-behaviour be-careful beware black Cacti cactus cactus-garden care careful caution communicating communication concern conditions danger dangerous directions informing lookout not-allowed not-permitted prohibited prohibition red risk risks sign signs warning warning-sign white aid announcement assist assistance availability available aware awareness blue equipment extinguish extinguisher fire fire-control fire-extinguisher firefighting foam help information limitations limited location observant observe safety advising communicate electric-power electrical electricity electricity-power-lines energy height high high-voltage overhead power power-lines power-supply protect protection risky strength supply wires wiring yellow alcohol banned consumption listen Look looking no-alcohol dangers deep deep-water denied depth direction don’t-alight flowers foliage permission-denied plants river riverside water wet avoid flammable gas gaseous natural-gas no-ignition outlet potential stay-clear vapour vapours warned appropriate behavior appropriate behaviour chinese colors colours emergencies emergency english languages rain rain-drops slip slippery slippery floor slippery surface slipping warning sign wet surface children kids slow slow-down slower watch watch-out not allowed not permitted permission denied polluted pollution rules toxic toxicity water pollution water toxicity weathered worn traffic vehicles cars monitored monitoring noted observed site-regulations speed