What is the fine-grained topic of the following text: According to Social Welfare And Development Team Leader Myrna Bersalona of DSWD, they have already prepositioned a total number of 3,700 food packs, 2,700 hygiene kits, and 2,700 sleeping kits for the affected families before the onslaught of typhoon Ompong in the province. Only return the topic.
Preparation of emergency supplies for typhoon Ompong