☣️danger biologiqueBiohazard. Means biohazards, contamination and danger. Use it for hazard warnings and zombie-apocalypse jokes.
💀crâneA skull. Means death, danger and dark humor. Use it for Halloween, warnings and laughing until you die.
☠️tête de mortA skull with crossed bones. Conveys poison, danger and death — the classic warning symbol.
⚠️symbole d’avertissementA warning. Means caution, danger and "heads up". Use it for warnings and important notices. Alternative: ⚠️ — same.
☢️radioactifRadioactive. Means radiation, hazard and glowing danger. Use it for hazard warnings and "toxic" jokes.
⚡haute tensionHigh voltage. Means electricity, lightning and sudden energy. Use it for storms, shocks and "electric" moments.