# Heavy Precipitation *Environmental Hazard* Everything within an area of heavy rain or heavy snowfall is [Lightly Obscured](/Rules/Source/variant-rules/lightly-obscured-xphb.md), and creatures in the area have [Disadvantage](/Rules/Source/variant-rules/disadvantage-xphb.md) on all Wisdom ([Perception](/Rules/Source/skills.md#Perception)) checks. Heavy rain also extinguishes open flames. *Source: Dungeon Master's Guide (2024) p. 69*