The Seattle area, particularly around the Space Needle, is bracing for dense fog that is expected to significantly reduce visibility. This weather phenomenon is common in the region, resulting from the interplay of moist Pacific air and cooler inland temperatures. The fog is most likely to be present in the early morning and may persist until the sun is high enough to dissipate it. Residents and tourists should exercise caution when traveling, especially near popular attractions. Drivers are advised to reduce speed, use headlights, and maintain a safe following distance, while pedestrians should ensure they are visible to drivers when crossing streets.