NATURAL DISASTERS RISK:
MEDIUM
The first thing visitors should know is that there are many fault lines under the city. This means it has a moderate to high risk of earthquakes. The two most active faults in this area are the Sweetwater and San Miguel Faults. The last earthquake in this area was on October 23, 2010, which measured a magnitude of 7.1 and caused significant property damage and injuries.
The city is prepared for these types of disasters and conducts yearly safety drills to make sure that everyone knows what to do in case an earthquake or any other type of natural disaster hits.
The city also has a warning system that notifies locals about earthquakes and other problems in the area using television, radio, text message, phone calls, internet alerts, etc. The only problem is that this system does not work when cell towers are down because people won't have access to their phones.
The risk of flooding in Chula Vista is moderate to high because it is known as a low-lying area and the San Diego River borders the city on three sides. There are usually between four and ten days each year when the entire city floods, which means residents must evacuate their homes temporarily.