The children of Israel again did that which was evil in the sight of Yahweh: and Yahweh strengthened Eglon the king of Moab against Israel, because they had done that which was evil in the sight of Yahweh.
The room in which Ehud met Eglon (Judges 3:20) was on the flat roof of his house. Rooms built this way caught the prevailing currents of air and therefore provided a cool place of retreat from the hot weather.