Santa Ana conditions are behind Southern California's scorching weekend temperatures. It was especially tough escaping the heat in the valleys. Antonio Castelan reports for the NBC4 News at 6 p.m. on Saturday, Sept. 29, 2012.
A hot weekend was expected to lead to an even hotter start to the week, when federal weather officials have called for a red-flag warning because of the heightened threat of fire.
An offshore flow beginning Sunday was expected across the Southern California region, with potential record-breaking heat Monday and Tuesday, according to the Oxnard office of the National Weather Service.
Breezy conditions, combined with the heat and dry fuel, are expected to create extreme fire danger, forecasters said.
And starting Saturday night, a south swell in the region's ocean was expected to produce dangerous rip currents near the shore.
The red flag warning is slated to go into effect 6 a.m. Monday, continuing until 6 p.m. Tuesday for the Los Angeles and Ventura county mountains, as well as the Santa Clarita Valley.
Those areas could see temperatures above 100 degrees and humidity levels of 10 percent, the weather service said. Those conditions will come with wind gusts of between 20 to 30 mph on Monday.
Tuesday is expected to be slightly cooler, with a cooling trend continuing throughout the week.
A broader fire weather watch was slated to be in effect Monday and Tuesday for much of Southern California.