Lack of rains this year has led fall of water levels of the Kariba dam reservoir on the Zambia-Zimbabwe border, and subsequently diminished power generation. The water level of the reservoir is now only 40% of its full capacity. Zambia generates almost all of its electricity by hydropower plants (over 99%), with Kariba Dam being the main source. Copper mining in northern parts of the country is vital for Zambian economy, but power crisis have now forced mining companies to cut back on production. These companies already suffer from low copper prices and now power shortage means significantly increased costs. Should the situation be prolonged, mines may be forced to be closed, and thousands of workers will be sent home. The power shortage is also hurting other industries and affects the daily life of Zambians.