Hurricane Celia was the costliest tropical cyclone in Texas history until Hurricane Alicia in 1983. The third named storm, second hurricane, and first major hurricane of the 1970 Atlantic hurricane season, Celia developed from a tropical wave in the western Caribbean Sea on July 31. Initially, the depression tracked north-northwestward without significantly strengthening, and crossed over western Cuba on August 1. Heavy rains on the island caused severe flooding, leading to five fatalities. The depression entered the Gulf of Mexico and was upgraded to Tropical Storm Celia later on August 1. Due to warm sea surface temperatures, Celia rapidly intensified into a major hurricane on August 1 and after the creation of the Saffir–Simpson hurricane wind scale in 1971 it was estimated to have been