The Fukushima activity increase that started in early July continues to increase. High radiation levels have been measured in rain in Wisconsin, Illinois, Michigan, Ohio, and Ontario for the last couple of days. Vegetation is being affected and damaged by this rain.
It originated in a storm system that moved into the Pacific Northwest around August 12. It moved across the continent, just north of the US/Canada border, before dipping back south into the US in the Great Lakes area.
Julie Wert made this measurement:
This storm system was in the Great Lakes area last night. It is moving towards the east coast, and will affect Ontario, New York, Pennsylvania, Maryland, and Virginia by tonight.
Majia has noted extensive activity from the Fukushima webcams on her blog.
UPDATE: Diane Steele took these photos of her squash and bean plants after the hot rainstorm moved through her home in Minnesota. This damage was not there prior to this rain.
Hot rain in eastern Ontario, Aug. 21: