Metro Manila is exposed to multiple natural hazards such as earthquakes, floods, and typhoons. It is surrounded by active faults including the Marikina Valley Fault System. Other distant faults such as the Philippine Faults, Lubang Faults, Manila Trench and Casiguran Faults, are a threat as well. Flooding is recurrent every year especially in low-lying areas of Valenzuela, Malabon, Caloocan, Navotas, Manila, Pasay, Parañaque, and Las Piñas, where flood are generally linked with the tidal movements in Manila Bay. Meanwhile, Marikina, Pasig, Taguig, and Pateros are areas inland that are also prone to flooding. These areas are located along the Marikina Valley where there is poor soil drainage and a shallow water table due to being in proximity to Laguna Bay's shores. Flood risks are generally lower in cities along the Guadalupe Plateau, including Quezon City, San Juan, Makati, Mandaluyong and Muntinlupa, where volcanic rocks rise up to 40 to 70 meters above sea level. Around five to seven typhoons hit Manila yearly. Manila was ranked as the second riskiest capital city after Tokyo to live in according to Swiss Re.