Seattle is bracing for a week of significant rainfall, with the National Weather Service forecasting up to 3 inches of rain in certain areas. This deluge is attributed to a Pacific storm system drawing moisture-rich air from the ocean, a typical pattern for this region but with a notably high intensity this time. Residents are urged to prepare for disruptive wet conditions, as the combination of heavy rain and gusty winds could lead to localized flooding, particularly in low-lying areas and those with inadequate drainage. The potential for power outages also looms, as strong winds may topple trees and disrupt power lines.