Orange Xs (and sometimes other colors...see additional pic below) were painted on all the houses in the flooded areas of New Orleans after they'd been checked for victims. Sometimes the Xs had other information in the quadrants, noting the rescuers' particular findings. (See card #2 below for an example.) My neighborhood was one of the last to be searched, probably because we were near the outer edge of the flooding. By the time search and rescue teams got there, the flood waters had receded and my neighbor, who had stayed behind, informed the nice volunteers canvassing our block of who stayed and who was gone. He kindly requested that if it was necessary to mark our houses with an X,
(orange spray paint) that it be done on the sidewalks in front of the houses or on the telephone poles rather than on the houses themselves. They complied. I appreciate that. Now I'll only have to figure out how to remove it from concrete.
(That's the shadow of the wrought iron gate in front of my house, and the rear, upper floor of the house in the lower left-hand corner. )
Remember, you can always click on the Pictures loaded from Flickr (orange X) to see a larger version.