LOS ANGELES — Ahead of Memorial Day weekend, Los Angeles County reopened some beach parking lots and authorized retail businesses inside enclosed shopping malls to reopen with curbside pickup service only, while continuing to warn of the continued spread of the coronavirus.

The changes came as county officials braced for a holiday weekend that could again challenge residents’ resolve to adhere to stay-at-home restrictions that bar large gatherings and require face coverings and social distancing when residents interact with others.

The county also authorized retail stores located in enclosed shopping malls to reopen for curbside merchandise pickup only.

County officials urged shopping malls to establish clearly marked curbside pickup areas for customers to pick up goods.

“As we have said — and have wanted to do all along — we would allow those at our schools to plan celebrations which include gatherings as long as they are in accordance with guidelines from Los Angeles County health authorities,” he said.