Scattered showers will increase across southern Los Angeles County this evening. Steadier rain will develop overnight through 3 am over the region…and there is a slight chance of thunderstorms later tonight as well. Heavier rainfall overnight may cause some minor street flooding and ponding of water on roadways. With this first rain of the season roadways will be very slick due to a six-month accumulation of dirt and oil on the Road surfaces. Motorists are urged to exercise caution and slow down when encountering wet roads overnight.