Lake Okeechobee Valley and the Everglades. The trough is underlain by clay deposits that compacted more than the limestone and sand deposits did along both coasts of peninsular Florida. Until about 6,000 years ago, the trough was dry land. As the sea level rose, the water table in Florida also rose and rainfall increased. From 6,000 to 4,000 years ago, wetlands formed building up peat deposits. Eventually the water flow into the area created a lake, drowning the wetlands. Along what is now the southern edge of the lake, the wetlands built up the layers of peat rapidly enough (reaching thick) to
Effects of the 1928 Okeechobee hurricane in Florida 25 others stayed at a newly constructed elementary school. A number of African Americans took shelter in a school building in West Jupiter. Strong winds struck southern Florida as the hurricane moved ashore, with three unofficial reports of 100 mph (160 km/h). In Miami to the south of the center, winds reached 78 mph (126 km/h), and farther south, Key West reported winds of only . The eye at landfall was wide, and after moving inland crossed Lake Okeechobee, where a calm was reported for 30 minutes. Winds at Canal Point, adjacent to the lake, were estimated as high as