What a proper tarp looks like
The tarp runs over the ridge so water cannot get under the top edge, and it is held down with boards or sandbags rather than nails through good roofing. A tarp that flaps in the wind will tear itself and the roof under it.
Call, do not climb
Wet tile and shingles are slick, and tile breaks under your weight. Stay off the roof. Call (909) 689-8243 and tell us where the water is coming in.