A blown tire. A surprise ER bill. A missed shift because childcare fell through. For most households, these are inconveniences. For a growing number of San Mateo County families, they are the first domino — the small setback that can easily tip into eviction, food insecurity, or job loss. That's the problem the Jackie Speier Foundation (JSF) is targeting with its newly launched Immediate Response Fund, which will begin disbursing money to families this fall. The fund is built