In South Korea, some schools closed Thursday because parents wereworried that rain across the country could be toxic.
"We've sent out an official communication today that schoolsshould try to refrain from outdoor activities," an educationofficial in South Korea said.
South Korea's nuclear safety agency reported a small levelof radioactive iodine and caesium particles in rain in the southbut said it was not enough to be a public health concern.
Nevertheless, many Koreans donned face masks, and streetsnear schools in Seoul were more congested than usual as parentsdrove children to work rather than let them walk.