Harvest should be the time for celebrations, weddings and full bellies in southern Malawi. But Christopher Witimani, Lilian Matafle and their seven children and four grandchildren had nothing to celebrate last week as they picked their meagre maize crop. Last year’s drought, followed by erratic rains, hit the village of Nkhotakota hard. But this year the rains never came and, for a second year running, the family grain store is empty. If they manage their savings carefully and eat just one small meal a day, they may just have enough food for two more months. By August, said Irish charity...