A freeze warning is currently in effect for the Philadelphia region until Tuesday morning, prompting concerns about potential damage to sensitive plants and crops. The area is experiencing a significant drop in temperatures due to a cold front, bringing unseasonably low conditions for this time of year. Residents are strongly advised to take immediate precautions to safeguard their plants by covering them with blankets or bringing potted plants indoors. Thoroughly watering plants can also help, as moist soil retains heat more effectively.