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Pedestrians cross a rain-soaked street near Balboa Park. (Photo courtesy city of San Diego)

San Diego County is in for a wet week, as rain showers roll in Tuesday and linger through Saturday, peaking with a downpour Thursday morning.

Forecasts predict 1 to 1.5 inches of rain in the mountains, up to three-quarters of an inch in coastal and valley areas, and lighter amounts in the deserts, according to the National Weather Service.

San Diego officials are preparing by placing “no parking” signs in flood-prone areas, clearing storm drains and offering sandbags at 11 recreation centers in each City Council District.

San Diego County and Cal Fire are also providing free bags and sand at numerous fire stations for people who live in the unincorporated areas. For a list of locations, go to alertsandiego.org.

Snow levels will drop from 6,500 feet Wednesday to around 3,500 feet by Thursday afternoon, the NWS said.

Temperatures will be cooler, with highs in downtown San Diego in the upper 50s to lower 60s. The deserts should see highs in the low 60s to mid-70s, and the mountains can expect daytime temperatures in the 40s starting Tuesday and continuing through the week.

Coastal waters will see high surf and rip currents, with a small craft advisory in effect Tuesday.

Showers may linger into Saturday, with another system possible next week, according to meteorologists.

City News Service contributed to this article.