The scattered showers that slickened roads across San Diego County Wednesday morning, though light as expected, brought the most rain the region has seen since mid March. Next up is a drying and warming trend. Temperatures, well below normal Tuesday and Wednesday, on Thursday should be near normal for early May. By Saturday, building high pressure should raise the highs to around 90 degrees in the inland valleys, the mid 70s at the coast and over 100 in the desert.