Let's first start off with some resources to bring you up to speed.
Then, in a article we'll share what one homeowner is doing in the southern state of Louisiana to fight against rusty ducts, dirt, moisture in the air and just plan cool sticky inside the home. Enough, we're not from the stone age, let's work the science of building. Resources to read:
BSD-102: Understanding Attic Ventilation by Joseph Lstiburek Oct. 26, 2006
Info-015: Top Ten Dumb Things To Do In the South by Joseph Lstiburek Feb. 5, 2009
Attic Ventilation Florida Homes Parker FSEC-CR-1496-05 linked from Inspectapedia.com
Minimizing Water Intrusion Through Roof Vents in High-Wind Regions FEMA publication
Roof & Attic Water Intrusion Division of Emergency Management Bureau of Mitigation Tallahassee, Florida 32399-2100
2015 International Residential Code
[A compilation of wind resistant provisions, prepared by FEMA]