is the largest city and urban area along the Gulf Coast. The Gulf Coast is made of many
inlets,
bays, and
lagoons. The coast is intersected by numerous rivers, the largest of which is the
Mississippi River. Much of the land along the Gulf Coast is, or was,
marshland. Ringing the Gulf Coast is the
Gulf Coastal Plain, which reaches from
Southern Texas to the western
Florida panhandle, while the western portions of the Gulf Coast are made up of many
barrier islands and
peninsulas, including the
Padre Island along the Texas coast. These landforms protect numerous
bays and
inlets providing as a barrier to oncoming waves. The central part of the Gulf Coast, from eastern Texas through Louisiana, consists primarily of marshland. The eastern part of the Gulf Coast, predominantly Florida, is dotted with many bays and inlets.
Climate The Gulf Coast climate is humid subtropical, although
Southwest Florida features a tropical climate. Much of the year is warm to hot along the Gulf Coast, while the three winter months bring periods of cool (or rarely, cold) weather mixed with mild temperatures. The area is highly vulnerable to
hurricanes as well as
floods and severe
thunderstorms. Much of the Gulf Coast has a summer precipitation maximum, with July or August commonly the wettest month due to the combination of frequent summer thunderstorms produced by relentless heat and humidity, and tropical weather systems, including tropical depressions, tropical storms, and
hurricanes, while winter and early spring rainfall also can be heavy. This pattern is evident in southern cities such as
Houston;
New Orleans;
Mobile, Alabama; and
Pensacola, Florida. However, the central and southern
Florida peninsula and
South Texas has a pronounced winter dry season, as at
Tampa and
Fort Myers. On the central and southern Texas coast, winter, early spring and mid-summer are markedly drier, and September is the wettest month on average at
Corpus Christi and
Brownsville, Texas.
Tornadoes are infrequent at the coast but do occur; however, they occur more frequently in inland portions of Gulf Coast states. Over most of the Gulf Coast from
Houston, Texas, eastward, extreme rainfall events are a significant threat, commonly from tropical weather systems, which can bring 4 to 10 or more inches of rain in a single day. In August 2017,
Hurricane Harvey made landfall along the central Texas coast, then migrated to and stalled over the greater
Houston area for several days, producing extreme, unprecedented rainfall totals of over 40 inches (1,000 mm) in many areas, unleashing widespread flooding. Climate scientists predict more hurricanes for Florida and the Texas coastline in particular.
Earthquakes are extremely rare to the area, but a
6.0 earthquake in the Gulf of Mexico on September 10, 2006, could be felt from the cities of New Orleans to Tampa.
Rising sea levels Due to the release of greenhouse gas emissions, glaciers and ice sheets are melting and expanding the oceans. The United States coastlines are projected to rise 1 foot in three decades or between 10 and 12 inches on average by 2050. The Gulf Coast will likely see the biggest change, with sea levels expected to rise between 14 and 18 inches. The Global and Regional Sea Level Rise Report predicted more frequent, major and destructive high tide flooding events along with taller storm surges by 2050 after scientists determined high tide flooding has been "increasingly common" over the past few years due to the rising sea levels. In 2021 alone rising sea levels cost the United States approximately $2.6 billion in relief efforts and caused at least seven deaths. By 2051, the cost of flood damage is expected to increase by 61%, or $32 billion.{{cite news|url= https://abcnews.go.com/US/climate-change-rising-sea-levels-increase-cost-flood/story?id=76044769|title=Climate change, rising sea levels to increase cost of flood damage by $34 billion in coming decades: Report ==Economic activities==