We had that in our porch a few weeks ago, the day I came to collect the Ducks, I was wet watching them outside etc then came in, had a shower and someone told us about the water, the porch internal gutter was blocked and it flooded the flat roof so came down the walle porch, all is oK now. Hope you sort yours out, this morning our hot water went off so called out the plumber who was across the road and sorted it very quickly, not a good thing cold running water in a B&B