Record high temperatures in Japan could curb the country’s rice production, threatening to create shortages of the staple grain and fresh price spikes as public resentment mounts over the cost of living.

Key rice-producing regions like Tohoku and Hokuriku saw the least amount of rain in July on record that goes back nearly 80 years, while a heat wave this month has broken multiple temperature records and scorched much of the country.

Such weather extremes may impact the harvest that typically starts in late summer, at a time when rice supplies have already been strained by adverse weather in recent years. That risks fanning prices that are already about 50% higher than a year ago, which could heap pressure on household budgets and political leaders.