FIRE
* 24d10 fire damage … Elemental Plane of Fire vortex (12,800 F, 7,100 C)
* 18d10 fire damage … ancient red dragon breath, submerged into lava (6,400 F, 3,530 C)
* 10d10 fire damage … young to adult red dragon breath, wading through lava stream (3,200 F, 1,769 C)
* 4d10 fire damage … wrymling red dragon breath, City of Brass streets (1,600 F, 870 C)
* 2d10 fire damage … roaring fire pit, inside engulfed building, fire elemental touch (800 F, 425 C)
* 1d10 fire damage … fire bolt cantrip, touching hot coals (400 F, 205 C)
Some heat and melting benchmarks…
* 6,200 C (6,700 F) … top of sun’s photosphere
* 3,700 C (6,700 F) … top of sun’s photosphere
* 1,770 C (3,220 F) … platinum melts
* 1,700 C (3,100 F) … sand melts
* 1,670 C (3,040 F) … titanium melts
* 1,510 C (2,750 F) … stainless steel melts
* 1,490 C (2,700 F) … wrought iron melts
* 1,370 C (2,500 F) … carbon steel melts
* 1,230 C (2,246 F) … granite stone melts
* 1,150 C (2,100 F) … cast iron melts
* 1,090 C (1,990 F) … copper melts
* 1,100 C (2,010 F) … yellow magma/lava
* 1,060 C (1,950 F) … gold melts
* 960 C (1,760 F) … silver melts
* 900 C (1,652 F) … brass melts
* 900 C (1,650 F) … orange magma/lava
* 700 C (1,300 F) … red magma/lava
* 430 C (800 F) … daytime high on surface of Mercury
* 205 C (400 F) … oven baking bread
* 125 C (260 F) … surface of the Moon in direct sunlight
* 75 C (165 F) … cooking meat
* 58 C (136 F) …Earth record high, Libyan desert
* 40 C (104 F) … summer highs in the Sahara Desert
* 20 C (85 F) … summer day in mid-80s, tropical rainforests
* 15 C (60 F) … mild day in spring/autumn
* 5 C (40 F) … chilly day in spring/autumn
* 0 C (32 F) … winter day at freezing
* -15 C (5 F) … frigid day in “single digits”
* -30 C (-22 F) … winter lows in the arctic
* -88 C (-126 F) … Earth record low, Antarctica
* -173 C (-280 F) … surface of Moon away from sunlight
* -180 C (-290 F) … nightnight low on surface of Mercury
* -230 C (-385 F) … surface of Pluto
* -273 C (-459 F) … “absolute zero” (0 Kelvin)
LIGHTNING
* 24d10 lightning damage … (160 gigawatts)
* 18d10 lightning damage … ancient blue dragon breath (80 gigawatts)
* 10d10 lightning damage … young to adult blue dragon breath, Lightning Bolt spell (at 8th level) (40 gigawatts)
* 8d10 lighting damage … base Chain Lightning spell (at 6th level) (30 gigawatts)
* 4d10 lightning damage … wrymling blue dragon breath (20 gigawatts)
* 3d10 lightning damage … base Call Lightning spell (3rd level) (15 gigawatts)
* 2d10 lightning damage … struck by bolt of lightning (10 gigawatts)
* 1d10 lightning damage … Shocking Grasp spell (4 gigawatts)