Forecasters warned of another thunderstorm in northern Los Angeles County Sunday, one day after lightning strikes caused multiple small fires in the Southland.

The National Weather Service said a “strong thunderstorm” would impact the Antelope Valley and adjacent foothills through 1:15 p.m. Sunday, with wind gusts up to 50 mph, pea-size hail and some dry lightning strikes likely.

“At 1221 PM PDT, Doppler radar was tracking a strong thunderstorm near Pearblossom AND Littlerock, approaching Highway 138. This storm was drifting slowly northward at 5 to 10 mph,” the agency said.

Temperatures remained hot Sunday, with a high of 90 degrees in downtown Los Angeles, highs in the mid-to-upper 90s in the valleys, and a high of 99 in Lancaster.

Extreme heat warnings were in place until at least 9

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