Heat Wave Lines black filled icon
Three parallel vertical wavy lines representing rising heat or steam
About the Heat Wave Lines black filled icon
Three tall wavy strokes stand in parallel, each bending through the same double curve with rounded ends, the classic shorthand for heat rising off a hot surface. With no sun or flame attached, the mark stays neutral enough to mean warmth, steam, humidity or a hot-surface warning. Use it for thermostat and climate control screens, weather and forecast apps, oven and hob warning labels, sauna and spa signage, and food packaging that flags a served-hot item.
The three strokes are evenly spaced and equal in height, so the group holds a stable rectangle even though every line is curved; consistent stroke weight keeps the rhythm readable. It pairs naturally with thermometer, snowflake, fire and humidity icons in the library. Give it vertical room rather than scaling it down, since the waves flatten out below 20 px.
This is the solid black filled version of the heat wave lines icon: a bold silhouette that reads clearly at 16-24 px and on dark or busy backgrounds, and prints well in one colour.
It downloads free as an SVG vector or transparent PNG in seven sizes, and the free online editor lets you recolor it, apply gold, silver, neon and gradient styles, add animation, or convert it to EPS, PDF and DXF.
Free for personal and commercial use with attribution.
