What happens to a freshly poured concrete slab footing if a heavy rain moves in imediately following the pour?

the forms were erected for my new home's slab a few days ago. This morning they poured just the footings inside the forms, and within 45 minuted a steady hard rain moved into the area. now there is lots of standing water in the form and much of the slury has washed and settled, leaving piles of exposed gravel in the form. What are the implications of what has happened? Will the footings still be strong or brittle? what will happen to the piles of loose gravel exposed under the wire mesh on top of the footings? when the rest of the slab is poured will it adhere to the footing or will there be a visable break between the two, and will the slab's strength be affected? How long will the footings need to cure before the rest of the slab is poured?