Temperatures are expected to get up into the lower 40s today, which is prime snow melting weather. With another winter storm possible on Monday, the last thing the city needs is to end up with major flooding — especially the kind of flooding that can turn into giant sheets of ice overnight. So here’s a quick reminder from the D.C. Water and Sewer Authority: please, please, please help by shoveling out storm drains. As WASA…