The National Weather Service issued a freeze warning at 11:24 a.m. on Thursday valid from Friday 11 p.m. until Saturday Jan. 10, at 8 a.m. for Joshua Tree NP West. Emergency alerts in Southern California For “considerable or catastrophic” hazards, emergency alerts will be sent to all enabled mobile phones in the area. To monitor lesser risk, residents are advised to sign up for county alert systems and to monitor agencies’ social media. How to sign up for alerts in your area: LA County Orange County Riverside County San Bernardino County What to do if there is a freeze watch or warning Freeze warnings are issued from May to October (but can be extended if necessary), when low temperatures are expected to be 29-32 degrees. If there is a potential for temperatures to fall into these thresholds, a freeze watch may be issued a few days ahead of time. According to the NWS Phoenix AZ, if a freeze warning or watch is issued for your area, there is little you can do to protect plants. If you can move your sensitive plants inside, do so because the freeze will likely kill them, depending on the severity of conditions. For more local weather alerts, visit our Weather Advisory page ...read more read less