Plan and develop multiple routes depending on the prevailing winds with grassland fires (includes Florida too).
During the risk of grassland fires, make sure that you have enough automobile fuel, and then some more (+),
as there is nothing that creates panic as having to wait 'in line' for fuel as the fire line approaches with others 'in line'.
Good to do for other disaster scenarios. Particularly flooding. Case in point. When Oroville Dam had its spillway failure a bunch of year ago, people living in Oroville clustered onto two main N-S roads to try to get out of town. Those roads turned into parking lots quickly. Reports from preppers noted that smaller roads out of town got them to safety (Sacramento area) in about 45 minutes, bypassing the traffic jam. They were safe in a much shorter time reaching high ground away from the flood plain as well.
Map them and DRIVE them.