With the strongest gusts expected on Tuesday, extreme fire condition threats will prevail until midweek, L.A.-area fire chiefs say.

The National Weather Service issued a Red Flag Warning starting Monday for San Diego County's inland valleys and mountains.

The Santa Ana winds fanning wildfires that have killed at least 25 people in Southern California and destroyed more than 10,000 houses, businesses and other structures in Greater Los Angeles are flaring up again.

In recent days, however, the region’s powerful Santa Ana winds—which have been fanning the flames—have begun to slow down. This lull has offered firefighters a reprieve and a key opportunity to make progress against the blazes, but forecasts suggest the Santa Ana will return next week. What are these gusts, and how have they become so strong?

After a brief break on Sunday afternoon, another prolonged round of gusty Santa Ana winds is expected to develop, forecasters say.

National Weather Service offices across Southern California are warning residents of an increase in weather conditions that are conducive to rapid fire growth. Meteorologists are most concerned about conditions from Monday afternoon through Wednesday morning when winds will be at their peak and relative humidity will be low.

The winds fueling Southern California wildfires form when a high-pressure system develops over the Great Basin in Utah and Nevada

Forecasters expect strong Santa Ana winds to return to the Los Angeles area this week with gusts up to 70 miles an hour in some places, putting firefighters in a race against time to control massive blazes that have killed 24 people and destroyed more than 12,

The wildfire is expected to become more worse for Southern California as strong Santa Ana winds are expected to become stronger in Monday and Tuesday. Th devastating wildfire, which has been raging for more than a week in Southern California,

Lighter winds in the Los Angeles area this weekend brought momentary respite to the thousands of firefighters battling deadly wildfires, but meteorologists

The reprieve may be short-lived, as there is 'virtually zero chance of rain' over the next week, which is also expected to see a return of the notoriously powerful Santa Ana winds.