Red rain warning for Tehran The meteorological organization issued a red warning for Saturday and Sunday and predicted heavy rain, thunder and in some hours temporary strong wind in different areas; In mountainous areas, fog, snow and blizzards are not far from expected. Crisis management in Tehran: heavy rain can slow down car traffic and block roads; Therefore, we ask citizens to use public transportation whenever possible. During these two days, people should avoid climbing and being in high places and not go to the banks of rivers and canals. Photo: Mohammadreza Alimadi - link.