Highly unusual conditions were described in the summer of 1783 after Laki , including poisonous volcanic fumes that killed perhaps 25 percent of the population of Iceland , persistent haze and oppressive heat in Europe , and blood-red sunrises over North America , Europe and other locations . Ash from Iceland volcano has grounded much of western Europe 's air traffic . Maria D'Arrigo says Iceland volcano in 1783 had drastic effects . She says it killed many , stunted agriculture and led to famine . A similar event today could stop some air travel for five years , she says .
Ash from Iceland volcano has grounded much of western Europe 's air traffic . Maria D'Arrigo says Iceland volcano in 1783 had drastic effects . She says it killed many , stunted agriculture and led to famine . A similar event today could stop some air travel for five years , she says .