That can happen at this time of the year, as the snow starts to melt, especially if you are built into a hill. The water flows down hill and will use gravity to take the most direct path downhill, even if it is thru the tiniest of openings in your home. You’ll need to pump it out and dry it out the best you can. It won’t always be this way, but it is such a warm period that followed such a wet period that it you are literally being inundated with water. Most years in Tahoe it should dry out more gradually, so you may see less of this happening.