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Why were warnings issued about food and water near Fukushima after the 2011 accident?

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earthquake damage, Honshu, Japan, 2011 — Japan earthquake and tsunami of 2011 Aerial view of damage to a portion of the northeastern coast of Honshu, Japan, following the offshore earthquake and resultant tsunami there on March 11, 2011.

Following the 2011 Fukushima accident, warnings regarding food and water consumption were issued by Japanese and international officials due to the detection of increased levels of radiation in local supplies.12

The contamination was a direct consequence of the nuclear power plant's damaged reactors, which experienced partial meltdowns and released radioactive material into the environment. Additionally, seawater used to cool the reactors became irradiated and subsequently leaked into the ocean through cracks in trenches and tunnels, leading to high levels of iodine-131 in the surrounding waters. These environmental releases necessitated strict monitoring and public health warnings to prevent radiation exposure through the ingestion of contaminated food and water.123