PNG ICO ICNS SVG MORE
Mixed
Outline
Free Daily Icon Set
Comment, Note, task
Black
512x512
problem, description, outline
Glyph
Free Misc Icon Set 2
Alert, problem, exclamation
bitsies!
fault, problem, Error
Handdrawn
Social Messaging & Productivity
danger, Attention, Error
Flat
Fire
fire, Damage, danger
Crimson
bell, danger, problem
fire, Alert, warning
PNG SVG MORE
Simple darkcon
warning, Error, skull
324x512
problem, warning, Caution