no dont think its another bar cause another bar indicator would also annoy me. when you go underground you find lava bedrock (wich supposingly is near the center of minecraft) and that other stuff. when you go near these for example lava then the corner of the screen becomes red and the more it goes to the center the more hotter it his until the screen becomes all red like when you go under lava (mabey a bit less). if it fills the whole screen (the red) you get half a heart of damage for every 3 seconds, so lava is more dangerouse dealing half a heart mor every 3 seconds (your probably dead before you get that have a heart damage). if you go near fire than you also get half a heart damage (cause you also get burned if you put your hand on top of a flame not only when you put it in).
with cold, the indicator is different, when it gets cold you see ice forming around the edge. when it gets all over the screen ( you wont be able to see much) you get same damage as heat and you need to warm up if you dont want to get killed frozen. also armor should have a temperature indicator wich shows how good it is against heat or cold it could also just be a symbol. like leather is more resistant to cold so there should be a snowflake on the armor when you look it up on your inventory. instead like iron armor is more resistant to heat and less to cold so there would be a flame symbol on it. for an example, when you go in the cold tundra biome with a leather armor, than cold comes less quickly, you could also bring torches, instead if you had iron armor on, then cold will come faster. only leather is resistant to cold, but there is an enchantment called resistance to tempreature (quite plain i admit) and you get resistant to all weather.
there are also ways not to die because of this like:
heat: pour bucket of water and go inside water, get hit by a snowball, iron,gold,daimond armor
I feel like that just would be a huge annoyance for mining and exploring. If you don't have any resistance then you will take damage any time you are going to collect obsidian or want to go get dark pine wood.
This would just add unnecessary difficult into the game in my opinion.
with cold, the indicator is different, when it gets cold you see ice forming around the edge. when it gets all over the screen ( you wont be able to see much) you get same damage as heat and you need to warm up if you dont want to get killed frozen. also armor should have a temperature indicator wich shows how good it is against heat or cold it could also just be a symbol. like leather is more resistant to cold so there should be a snowflake on the armor when you look it up on your inventory. instead like iron armor is more resistant to heat and less to cold so there would be a flame symbol on it. for an example, when you go in the cold tundra biome with a leather armor, than cold comes less quickly, you could also bring torches, instead if you had iron armor on, then cold will come faster. only leather is resistant to cold, but there is an enchantment called resistance to tempreature (quite plain i admit) and you get resistant to all weather.
there are also ways not to die because of this like:
heat: pour bucket of water and go inside water, get hit by a snowball, iron,gold,daimond armor
cold: torches, lava, redstone lamps, glowstone, jack'o'lantern.
please comment
Roleplay characters:
Death (me)
War
Pestilence
Famine
This would just add unnecessary difficult into the game in my opinion.
Roleplay characters:
Death (me)
War
Pestilence
Famine