Dade County and initially including all of Lake Okeechobee. The southernmost part of Palm Beach County was separated to create the northern portion of Broward County in 1915, the northwestern portion became part of Okeechobee County in 1917, and southern Martin County was created from northernmost Palm Beach County in 1925. The boundaries remained the same until 1963, when the Florida Legislature reduced Palm Beach County's share of Lake Okeechobee from about 80 percent to less than 40 percent and divided the lake more equitably among Glades, Hendry, Martin, and Okeechobee counties. A final change to the county's boundaries occurred in 2009, when a small portion of land was given to Broward County. The 1910s and much of the 1920s brought prosperity and rapid population growth to South Florida, coinciding with the Florida land boom of the 1920s. Many local historic districts and landmarks listed in the National Register of Historic Places in Palm Beach County were designed and constructed during the 1920s, with the main contributors being architects Maurice Fatio, Addison Mizner, Marion Sims Wyeth, and the firm Harvey and Clarke, which included Gustav Maass. Total property value in West Palm Beach skyrocketed from $13.6 million in 1920 to $61 million in 1925, before briefly reaching a pre-Great Depression peak of $89 million in 1929. The city's population quadrupled between 1920 and 1927. Early on September 17, 1928, the Okeechobee hurricane made landfall near West Palm Beach as a category-4 storm and crossed Lake Okeechobee shortly thereafter. While the hurricane caused catastrophic impact in eastern portions of the county, the Lake Okeechobee region suffered a much heavier loss of life. Wind-driven storm surge in the lake inundated hundreds of square miles, including the nearby communities of Belle Glade, Pahokee, and South Bay. At least 2,500 deaths occurred, many of whom were black migrant farmers. An assessment of impact throughout the county reported 552 businesses destroyed, 1,447 businesses damaged, 3,584 homes destroyed, and 11,409 homes damaged, leaving 4,008 families homeless. However, several cities were excluded, such as Boca Raton, Greenacres, Lantana, and South Palm Beach. Damage in South Florida totaled roughly $25 million. In response to the storm, the Herbert Hoover Dike was constructed to prevent a similar disaster. As a result of 1926 Miami hurricane and the 1928 storm, Palm Beach County, along with the rest of South Florida, began suffering economic turmoil and pushed the region into the