Increases in rainfall intensity will have some effect on the transport of heavy metals by enhancing runoff from soil and increasing the leaching of heavy metals into water systems, with magnitudes dependent on local conditions  . Methyl mercury  is highly neurotoxic and nephrotoxic and bioaccumulates and biomagnifies through the food web via dietary uptake  . Ocean warming facilitates methylation of mercury, and the subsequent uptake of methyl mercury in fish and mammals has been found to increase by 3-5% for each 1ºC rise in water temperature . A changing climate will release mercury from snow and ice, raising the amount of mercury in aquatic ecosystems, although its importance relative to industrial sources is unknown .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report