When the rooftop is not strong or it's damaged from any area it's not safe for you. When the roof started leaking around the chimney area you need to repair the roof as soon as possible because it can cause big damage. Do not try to fix the roof on your own because it's about the rooftop, not anything else, so hiring a professional roofing company is beneficial. To know more visit:  https://olympusroofingspecialist.com/how-to-fix-roof-leak-around-chimney/