California is bracing for more extreme weather this weekend. Two more storms will barrel into the state on Friday and over the weekend.

The National weather service is forecasting heavy rain and flooding in the northern parts of the state on Saturday and into early Sunday morning. Saying residents should “stay weather aware and prepare now.” California has been hammered by a succession of storms since the start of the year, with northwestern and central California already soaked by between 10 and 20 inches in the last two weeks. Experts say it will take far more to reverse the effects of years of drought.

At least 18 people have now died in incidents linked to the extreme weather with the body of a 43-year-old woman discovered in a submerged vehicle in Sonoma County on Wednesday. Near the city of Paso Robles, 5 -year-old Kyle Doan, swept away in the floodwaters when he and his mother got stuck in their car, is still missing.