“Have pity on us and obtain for us protection from hurricanes and all other disasters…”

This devotion is popular around New Orleans. And the website for the National Shrine of Our Lady of Prompt Succor offers some background:
French Ursulines arrived in New Orleans in 1727 and established the oldest school for girls currently operating in what is now the United States. During a per iod of crisis after a large group of nuns left New Orleans for Cuba in 1803, Mother St. Andre Madier, one of the seven nuns who remained, appealed to her cousin, an Ursuline in France whom the reign of terror had forced to leave her monastery at Pont-Saint-Espirt. She was Mother St. Michel Gensoul, a remarkable woman of great talent and interior piety, who, during the exile in Montpellier, opened a boarding school for girls there. Fearing for the flourishing school, Bishop Fournier refused to request her leave, saying that only the Pope, then a prisoner of Napoleon, could give such a permission. One day while praying before a statue of the Blessed Mother, she was inspired to say, “O most holy Virgin Mary, if you obtain a prompt and favorable answer to my letter, I promise to have you honored in New Orleans under the title of Our Lady of Prompt Succor.”
Since the end of December 1810, when Mother St. Michel, her companions and the statue arrived in New Orleans, devotion to Our Lady of Prompt Succor has grown in New Orleans and Louisiana, and has spread through the United States and even beyond. In the late 19th century, Pope Leo XIII granted the solemn crowning of the statue, an honor carried out splendidly by Archbishop Janssens on November 10, 1895. In 1912 this devotion was officially approved by Rome.
From conversations, letters, contributions, requests for Masses of thanksgiving and similar sources, generations of Ursulines and friends of Our Lady of Prompt Succor have learned about many of the favors granted through the intercession of Our Lady in response to pleas for quick and favorable help. We will never know them all. But those we know are a source of encouragement and hope to all who count on Our Lady’s help.
The prayer to Our Lady: