By Alek Arend The San Francisco 49ers may end up experiencing a severe case of deja vu when they take on the Seattle Seahawks in Santa Clara this Sunday afternoon. Last Sunday in Week 1, the Niners battle the Chicago Bears in a monsoon at Soldier Field. It resulted in a 19-10 loss to Justin Fields and Co. Trey Lance was wildly ineffective, completing just 13 of his 28 pass attempts for 164 yards and one pick. Unfortunately, Lance may once again have to battle the elements this Sunday. There’s currently an 84-percent rain forecast for the Santa Clara area at 49ers-Seahawks kickoff. That forecas…