Hilary was making its presence felt in portions of Southern California at the start of the weekend, and AccuWeather meteorologists say this is just the start of what could be an "extraordinary event." Life-threatening flooding is expected in California. READ MORE: https://bit.ly/45xza7B » Subscribe now for more videos from AccuWeather: https://bit.ly/2TQgT0O Download the AccuWeather app: » iOS: https://apple.co/3gwaSnL » Android: https://bit.ly/3xpmwGw » AccuWeather is the world’s most accurate source of weather. But don’t just take our word for it. Find out how we make a difference in the lives of more than 1.5 billion people by people who care about the weather. » Check out more weather videos here: https://www.accuweather.com/en/videos Follow AccuWeather here: » Facebook: / accuweather » Twitter: / accuweather