Hurricane Hilary Causes Flooding in Baja Causing 1 Death, Headed for California

Hurricane Hilary has already proved deadly ... triggering massive floods in Baja, Mexico and claiming at least one life.

The storm hit in the town of Santa Rosalia and clearly packed an enormous punch, flooding streets and damaging or destroying property in its path.

You could feel the intensity from comments on social media .. "Holy sh** 👀 #HurricaneHilary Baja California, Mexico. I hope everyone’s okay."

The good news ... Hilary seems to be losing its intensity ... it's currently a category 1 hurricane but by the time it hits Cali later Sunday it will be downgraded to a category 4 storm -- still intense, but not a hurricane.

There's still a tropical storm warning for millions of folks in SoCal, and there's fear it will cause flash flooding, as well as landslides.

There are some areas of California that will get more rain in 24 hours than they usually get in a year. Palm Springs is particularly problematic.

There's also an alert for Catalina Island ... 26 miles off the coast of Los Angeles.