Answer:
Step-by-step explanation:
As far as I am aware, there is no known instance of a volcano causing the Mississippi River to freeze in New Orleans. The climate in New Orleans is generally warm and humid, and it is very rare for the river to freeze over in this area. The last time this is known to have occurred was during the extremely cold winter of 1899, when a combination of prolonged cold weather and ice jams caused the river to freeze.
Volcanic eruptions can have significant impacts on climate and weather patterns, but it is unlikely that one would cause the Mississippi River to freeze in New Orleans. However, there have been historical examples of volcanic eruptions causing short-term cooling of the climate in various regions around the world. For example, the 1815 eruption of Mount Tambora in Indonesia caused a global "year without a summer," with unusual cold temperatures and widespread crop failures.