alarm alarma bell caution danger disaster fire fire alarm fuego hazard Life Saver save security communicate communication emergency emergency exit escape exit fire escape safety sign warning flash flashing light lights police policia siren strobe strobe light warn background block empty fence fire-hazard grass grasses green hazardous neglected plant pests problems property risky self-seeding shimmering shiny spring suburban block textures unattended undeveloped land unneighborly unneighbourly vacant vacant block vacant property vegetation weeds wild oats accident burn chemical device equipment extinguish extinguisher fire extinguisher logo firefighter fireman flame foam handle heat help logo object pictogram precaution protection red rescue safe spray white work