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Alert on in Signs & symbols category icons

Warning Danger Hazard Attention Death Alarm Caution Error
caution, hand, hand gesture, high five, raised hand, stop, five
attention, bomb, caution, danger, explosion, hazard, warning
error, math, multiply, wrong
alarm, alarm on, alert on, bell, bell on, notify, alert
error, file, not found, question mark, unidentified, unknown, unknown file
alarm, alert, siren, warning
bones, danger, death, hazard, skeleton, skull, warning
danger, hazard, nuclear, radiation, radioactive, toxic, warning
attention, caution, caution sign, danger, exclamation mark
delete, erase, error, multiply, remove, trash, x
acid, battery, corrosive, danger, death, hazard, warning
alarm, alert, bell, christmas, notice, notification, ring
cancer, carcinogen, danger, hazard, health, medicine, warning
bones, danger, death, hazard, skeleton, skull, warning
burn, burning, danger, flame, hazard, oxidising, warning
bacteria, danger, germ, hazard, protection, virus, warning
bacteria, bug, danger, germ, hazard, virus, warning
angry, double exclamation mark, exclamation, exclamation mark, irritated, temper, warning
caution, hand, hand gesture, high five, raised hand, stop, emoji
acid, attention, corrosive, danger, death, hazard, warning
attention, bang, danger, ears, hazard, noise, warning
alert, allow, notification, on
alarm, alert, bell, interface, notification, on, verified
alarm, alert, siren, warning
error, file, not found, question mark
alarm, alert, siren, warning
error, help, question, question mark
alarm, alert, siren, warning
alarm, alert, siren, warning
dangerous, nuclear, radioactive, radioactive sign, warning, biohazard
caution, entry, no entrance, no entry, not allowed, stop
alert, attention, emoji, exclamation, exclamation mark, mark, point
caution, caution sign, danger, exclamation mark, notice, warning, warning sign
alert, attention, emoji, exclamation, exclamation point, mark, point
biohazard sign, biological hazard, hazard, medical waste, threat to human health, warning, biohazard
danger, death, hazard, poison, poison water, poisonous, warning
danger, hazard, internet, non ionizing radiation, radiation, warning, wi-fi
danger, electrons, hazard, neutrons, particles, protons, warning
box, crane, danger, delivery, hazard, transport, warning
attention, danger, gearwheels, hazard, sprocket, warning, wheels
crush, danger, danger of harming, harming, hazard, squash, warning
danger, emergency, fire, flame, flammable, hazard, warning
attention, cutter, danger, hazard, rotating cutter hazard, saw, warning
alert, attention, danger, exclamation, exclamation mark, hazard, warning
cold, danger, hazard, snow, snowflake, warning, winter
danger, electrons, hazard, neutrons, particles, protons, warning
danger, gas mask, hazard, nuclear, radiation, toxic, warning
alert, attention, cross, danger, hazard, irritant, warning
blindness, danger, death, hazard, laser, warning, weapon
attention, danger, death, electric hazard, hazard, shock, warning
chemical, chemical weapon, danger, hazard, toxic, warning, weapon
bacteria, danger, disease, hazard, infection, virus, warning
attention, connection, danger, hazard, magnetic waves, warning, wave
bones, danger, death, hazard, skeleton, skull, warning
bones, danger, death, hazard, skeleton, skull, warning
danger, electrons, hazard, neutrons, particles, protons, warning
atomic, chemistry, danger, hazard, optical radiation, radiation, warning
caution, danger, death, electric, electricity hazard, hazard, warning
attention, danger, gas mask, hazard, radiation, toxic, warning
attention, bomb, danger, explosion, explosive, hazard, warning
error, fault, no enter, no entry sign, not allowed, restriction, delete
attention, danger, death, electric shock hazard, hazard, shock, warning
cut, cutter, cutting, danger, danger of cutting, hazard, warning
climate, danger, hazard, temperature, thermometer, warming, warning
danger, hazard, high temperature, hot, temperature, thermometer, warning
danger, electrons, hazard, neutrons, particles, protons, warning
danger, hazard, magnet, magnetic, magnetism, science, warning