Miró fortified Nogales (present-day Vicksburg) and the mouth of the Mississippi against the possibility of war with the U.S. After the Good Friday fire in March of 1788 destroyed almost all of the city of New Orleans, Miró arranged for tents for residents, brought in food from warehouses, sent ships to Philadelphia for aid, and lifted Spanish regulations restricting trade to the city. The city of New Orleans (today's French Quarter), was rebuilt with more fire-resistant buildings of brick, plaster, heavy masonry, ceramic tiled roofs, and courtyards. Among the new buildings built under his watch was the Saint Louis Cathedral.