Grids may suffer from transient blackouts and brownouts, often due to weather damage. During forthcoming solar storms, this could result in blackouts and disruptions in artificial satellites. Such sudden electrical blackouts may threaten food production. For years after, she suffered severe headaches, blackouts and depression. These were simply coarser devices installed to prevent catastrophic blackouts. Intermittent service continued after the first two widespread blackouts. In Hawaii, the military imposed martial law, complete with curfews and blackouts. Once-prosperous cities were at the mercy of blackouts and curfews. As he recovers, Nikolas begins exhibiting symptoms of uncontrollable violence, anger and blackouts. Abnormal heart rhythms or arrhythmias may be asymptomatic or may cause palpitations, blackouts, or breathlessness. Commonly, bites from this snake cause symptoms including nausea, blackouts, and paralysis. As a result of the storm, blackouts and car accidents were reported in Toronto. Nationwide recurring electrical blackouts in Venezuela began in March 2019. Brian suffers from chronic nosebleeds, blackouts, and bedwetting for years after entering the crawl space. Air raid wardens for every block enforced blackouts and manned battle stations during drills.