Los Angeles residents are facing another round of intense fire danger as gusty Santa Ana winds were expected to intensify once again over the next few days.

The National Weather Service has warned these winds could lead to “explosive fire growth,” prompting rare, “particularly dangerous situation” red flag warnings for parts of Ventura and Los Angeles Counties.

Key things to know about the forecast

• Winds were expected remain strong from late Monday through Wednesday, a forecast that has prompted some of the strongest warnings the Weather Service has in its arsenal.

• A weather system moving in on Thursday is likely to bring conditions that will help firefighters in their efforts to gain control of the blazes.

• The region remains critically dry and is not expected to see significant rainfall until at least next month.

The Weather Service began using the “particularly dangerous situation” red flag warning in recent years to alert firefighters to types of conditions where fires are more likely to spread, said Todd Hall, a meteorologist at the Weather Service in Los Angeles. The intention had been to use them once every three to five years, he said; two have been issued in the last week.

The latest warnings will be in place from early Tuesday morning until noon on Wednesday, when gusts from 45 to 70 miles an hour are expected to batter the region. While not as severe as those last week, which fueled the destructive Palisades and Eaton fires, these winds still pose a significant threat that large fires may spread quickly.

In addition, across the wider region, longer-term warnings for fire weather from the Weather Service’s Storm Prediction Center have been upgraded to “extreme,” the highest classification. In areas such as Ventura Valley and the San Bernardino Mountains, wind gusts exceeding 50 m.p.h. will combine with extremely dry air to create hazardous conditions from Monday to Wednesday. The most intense threat was expected from late Monday into Tuesday.