Rainfall in July is welcomed by farmers because that is when the rice ears start to appear. Without rain, the plants are unable to thrive. The Tohoku region's water situation is also dire in Miyagi Prefecture, where the Naruko dam is now officially dry. A dam for farmers in Hanamaki, in neighboring Iwate Prefecture, is operating at only 20% of capacity. Water from the Hanamaki dam was cut off to rice fields for five days in late July. High temperatures and scant rainfall create ideal conditions for an outbreak of shield bugs that can devastate rice crops. As of 30 July, the farm ministry had issued 33 cautions to 27 prefectures about the increased prevalence of the bugs. That is a pace similar to last year when the largest number of cautions were issued over the past decade.