The city of San Diego spent $52 million last year on emergency repairs for infrastructure projects such as replacing collapsed storm drains, clearing water channels and repairing sinkholes which arose due to heavy rain.  Of the 29 emergency repairs performed across the city last year, 23 were related to stormwater infrastructure and totaled about $45 million, according to a city report. Two years ago, city officials decided to set aside money from the capital improvements budget for an emergency line of funding for storm drains. As the city faces a shortfall of about $250 million in the budget that takes effect July 1, the emergency funds may become even more critical to addressing stormwater needs.