Climate Survival

Heat and cold survival driven by biomes. Climb snowy mountains and you freeze. Cross deserts, badlands, savannas and the Nether and you overheat. Keep warm, keep hydrated, or pay for it.

Freezing

• Applies in cold biomes, outdoors, above y=56: snowy plains, ice spikes, snowy taiga, snowy beach, snowy slopes, grove, frozen peaks, jagged peaks, frozen rivers and frozen oceans.
• After 120 seconds of exposure you take freeze damage and Weakness.
• A temperature bar appears after 20 seconds of exposure.

Stay warm with:

Source	Range	Effect
Full leather armor set	worn	immune while worn
Torch, fire, soul fire	3 blocks	immune while nearby
Lit campfire	4 blocks	Resistance for 5 minutes
Lit furnace, blast furnace, smoker	3 blocks	Resistance for 8 minutes
Magma block, lava	3 blocks	Resistance for 3 minutes

Resistance doubles as cold immunity, so a good campfire stop lets you push on up the mountain.

Overheating

• Applies in hot biomes (desert, badlands, savanna) above y=56 outdoors, and everywhere in the Nether.
• Heat rises 1 per second: Hunger at 150, Slowness at 300, burn damage at 450.
• A temperature appears at 100 heat.
• Drink a potion or water bottle to remove 150 heat, or stand in water.
• Heat drops outdoors in neutral biomes and in caves, and holds still indoors.

Weather events

Random, unannounced events shake up the rules for a few minutes. The only cue is the sky: a blizzard brings rain (snow in cold biomes), a heatwave clears it.

Event	Cold biomes	Neutral biomes	Hot biomes
Blizzard	cold builds 2x faster	behave like normal cold biomes	immune, no heat builds
Heatwave	immune, no cold builds	behave like normal hot biomes	heat builds 2x faster

• Events start at random, 20 to 50 minutes apart, and last 3 minutes.
• They only affect the Overworld. The Nether stays as hot as always.
• Start one yourself with /function highcold:event/blizzard or /function highcold:event/heatwave, and end it with /function highcold:event/stop.
• Both numbers are configurable, in minutes: /function highcold:config/interval {min:20,max:50} sets the gap between events and /function highcold:config/duration {minutes:3} sets how long they last.

Safe zones

Plains, forests, jungle, taigas and other neutral biomes, caves, and everything below y=56 are safe.

Extras

• Stackable water bottles: they stack to 16. Bottles in player inventories are converted automatically.
• Per-player temperature bars for heat and cold, shown only to the affected player.

Installation

Put the zip in your world's datapacks folder (or add it when creating a world) and run /reload.

Or just get the mod version for all mod loaders!

Notes

• Creative and spectator players are unaffected.
• Water bottle stacking works by converting bottles every second, so a fresh bottle is unstackable for a moment and bottles in chests stay unstackable until picked up.