Get rid of the grass, or else
For years, I owned vacant beachfront property in California. Every February I would receive notice from the local fire department to weed my property and make certain there was no pampas grass (HCN, 4/18/11) on it, else the fire department would do it for me and charge an outrageous fee. I was impressed that the local jurisdiction recognized the invasive and highly flammable properties of pampas grass. I always kept pampas grass off my properties, not for its invasive properties but because it harbored rats who loved to nest in it.
Taos, New Mexico