Hilary updates: Over 1 foot of rain hits San Bernardino as LA avoids catastrophe
Hilary soaked Southern California, flooding roads and knocking out power.
All tropical storm warnings have been canceled across Southern California as the remnants of Hilary, which no longer meet the threshold of a tropical cyclone, track north.
Once a Category 4 hurricane, Hilary tore through Southern California with historic rainfall on Sunday, flooding roads and knocking out power.
Latest headlines:
Nearly 1,000 flights canceled ahead of storm
Airlines have canceled 944 flights so far as Tropical Storm Hilary approaches the West Coast, according to FlightAware.
The majority of the affected airports are in the West.
Southwest Airlines has cancelled 683 flights, the most flights of all U.S. airlines.
The airline has canceled all flights in and out of Palm Springs International Airport until at least Monday.
-ABC News' Sam Sweeny
Hilary weakens to a tropical storm
Hurricane Hilary, once a Category 4 hurricane, was downgraded to a tropical storm Sunday as it approaches the West Coast.
The center of the storm system is currently located about 220 miles south-southeast of San Diego. It is moving about 25 mph to the north-northwest.
About a quarter of an inch of rain has already fallen in Palm Springs on Sunday morning, while San Bernardino has seen about .8 of an inch, according to the National Weather Service.
Tropical storm force winds will start moving into Southern California over the next few hours.
Catastrophic and life-threatening flooding is likely over portions of the Southwest through Monday, forecasts show.
-ABC News' Kenton Gewecke
Hilary weakens to category 1 hurricane
Hilary continues to weaken as it moves north-northwest, now a category 1 hurricane with maximum sustained winds of 90 mph.
Evacuation orders issued for areas of San Bernardino County
The San Bernardino County Sheriff's Department issued a mandatory evacuation order for several regions at 7:15 p.m. PT. The regions include Oak Glen, Forest Falls, Mountain Home Village, Angelus Oaks, and northeast Yucaipa.
Earlier Saturday, San Bernardino County Sheriff's issued an evacuation warning to its residents. At the time, San Bernardino County spokesperson David Wert told ABC News, "The purpose is to warn the population that there is an impending danger. They should start making arrangements to evacuate."
The Sheriff’s office released an evacuation map to help residents know if they’re in the affected area.
Rare 'high risk' forecast for excessive rainfall issued
The National Oceanic and Atmospheric Administration's Weather Prediction Center issued a rare "high risk" forecast for excessive rainfall for Sunday across a large swath of Southern California, from Palm Springs up toward Death Valley.
"High risk" forecasts are only issued a couple times a year on average, and 39% of all flood-related fatalities and 83% of all flood-related damages in the U.S. occur on those days.
A "moderate risk" for extreme rainfall has also been issued from Las Vegas to San Diego and Los Angeles. Numerous flash floods could unfold in these areas as well, with some of them potentially significant and very dangerous.
The deadliest hazard associated with tropical cyclones over the past decade is flooding from heavy rain.
-ABC News' Dan Peck