A sandstorm will damage all Pokémon that are not Steel, Rock, or Ground-type by
1
16
of their HP. Pokémon that are in the intermediate stage of Dig will not take damage during that turn. Synthesis, Morning Sun, and Moonlight will heal
1
4
HP. Rock-type Pokémon will have their Special Defense raised by 1.5× while a sandstorm is present.