Farm officials said flooding destroyed 5 per cent of expected 4th-quarter production in the rice-producing provinces nation- wide. Authorities in the coastal town of Casiguran, where Koppu made landfall as a Category 4 typhoon, are deploying heavy equipment to clear roads of uprooted trees, toppledelectric posts and debris. "When we went around the town, we saw the typhoon's destructive impact, there were so many houses destroyed," munici- pal official Nida Coralde said, adding that distribution of relief supplies has been started. Strong winds reduced people's homes to matchwood, leaving them with nothing, said one sur- vivor, as residents began work to repair homes. Strong winds grounded mili- y tary planes and helicopters on Tuesday, forcing the government to send in food, water and other relief materials by road. Some areas were still flooded, without power and communication links. The Philippines is hit by 20 typhoons every year, on average.