Delta Works was completed by the Europoortkering which required the construction of the Maeslantkering in the Nieuwe Waterweg between Maassluis and Hoek van Holland and the Hartelkering in the Hartel Canal near Spijkenisse. The works were declared finished after almost forty years in 1997. In reality the works were finished on 24 August 2010 with the official opening of the last strengthened and raised retaining wall near the city of Harlingen, Netherlands. Due to climate change and relative sea-level rise, the dikes will eventually have to be made higher and wider. This is a long term uphill battle against the sea. The
Indus River Delta-Arabian Sea mangroves spills are another hazard. Most of the Indus Delta mangroves have been cleared for firewood and to create grazing land but some remains in three protected areas: Marho Kotri, Cut Munarki Chach Wildlife Sanctuaries and Mirpur Sakro Game Reserve. The World Wildlife Fund assesses the status of the mangrove habitat as being critical or endangered. In projects started in 1985, the Sindh Forest Department has been in the forefront of replanting and restoring mangrove areas in the delta, with support from the International Union for Conservation of Nature, the United Nations Environmental Programme, UNESCO and the World Bank. About of