Forecasts can vary greatly from the coast to the inland suburbs.
Stay with the hardier type plants in inland locations such as wax myrtle, dahoon holly or native red maple. If a freeze threatens, cover tender plants with a sheet, box or blanket. Do not use clear plastic. Water heavily the night the freeze is expected and pull mulch away from the plants . The warm soil will release heat and raise the temperature around the low plantings and could save them.