LOS ANGELES (CBSLA.com) — Firefighters across the Southland remained on alert Thursday as dangerous fire conditions develop.

A red flag warning will remain in effect through 8 p.m. for the the majority of Southern California and wind advisories for the Inland Empire and Orange County will be in place until the afternoon.

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Wind gusts could be up to 60 mph in Los Angeles and Ventura counties, according to the National Weather Service.

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Humidity levels, which dipped to the single digits Wednesday, will remain low Thursday and Friday.

The strong winds combined with the well above average temperatures could create a hazardous fire weather environment, the NWS said.

Firefighters were on call overnight watching for hot spots where 20 acres burned in Rialto.

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About 100 firefighter volunteers were called in to Orange County be on the lookout for smoke or suspicious activity, officials said.