The primary risks from PTC 1-C include life-threatening flooding and mudslides, particularly in mountainous areas. Rainfall totals of up to 20 inches in some locations could lead to significant hazards. Gusty winds accompanying the system may also cause localized damage, such as downed trees and power lines. Residents and visitors across the Hawaiian Islands are advised to monitor updates closely, as the exact path and intensity of the storm remain uncertain. The potential for widespread flooding poses a serious threat to infrastructure and safety.