def get_flood_risk_rating(num):
    """Converts an integer value of a flood risk rating to the rating it 
    represents - low (0/1), moderate (2), high (3), severe (4)"""

    if num == 0 or num == 1:
        return "Low"
    if num == 2:
        return "Moderate"
    if num == 3:
        return "High"
    if num == 4:
        return "Severe"
    return None