"San Diego's Record Rainfall Triggers Infrastructure Warning and Transit Disruptions"

San Diego experienced its rainiest day in January history with 2.73 inches of rain, causing widespread flooding and prompting the city's mayor to declare a state of emergency due to the "fragile state" of the infrastructure. The National Weather Service described the rainfall as "wow," and the storm revealed the need for significant investments in the city's stormwater system. Climate change is expected to make extreme precipitation events more frequent, with warmer air temperatures contributing to heavier rain and snow storms.