Back-to-back bouts of rain that began Monday will make for an unusually wet week leading up to Halloween, said forecasters who are beginning to grow concerned about potential flooding this winter in fire-scorched areas. Sprinkles began falling Monday morning and spread throughout the afternoon, with downpours expected to last through the night. The stormy weather will continue until Tuesday evening, with as much as 2 inches of rain expected in the hardest-hit areas of the North Bay, National Weather Service meteorologists said.