I suspect that your shrubs are red tip photinia, a fairly common landscape shrub in your area. New growth emerges with red foliage, changing to green as it matures. It does have white flowers in spring. This shrub is somewhat susceptible to Entomosporium leaf spot, a fungal disease. You may have to spray a protective fungicide to get the problem under control. It also helps to improve air circulation so that the foliage dries off quicker. This may mean pruning by thinning out some branches of the shrub or removing nearby shrubs that impede air movement.