When Maria Bernal's baby stopped breathing after midnight, she called 911. The child turned blue as she waited 90 minutes for ambulances to arrive; the ambulances were stuck in the sand.

Over 250 families live in Highland Oaks, an unincorporated corner of Bexar County, cut off from essential services because they have no streets -- only sand. Schools stopped sending buses to Highland Oaks because they, too, would get stuck.

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