Luc, I really feel for you. I know exactly how it feels. Really glad that you and your property are safe and I'm sorry to hear about some of your plants.
Here in South Africa the people love to start field fires in the winter when it is not raining. They do it for the enjoyment and some believe if they don't burn enough field, we won't have a good raining season. I stay at the foot of a mountain with kilometers and kilometers of mountain and nothing behind me. Our house unfortunately has a thatch roof (hopefully that will soon change). It happened twice since we live in our house that someone starts a fire on the mountain. Everytime there is a fire, my husband is at work, which is one and a half hour drive and sometimes he is underground in the mine. Usually we have wind that makes things worse. Lucky for us, we live in a close community and everytime people will come to help fight the fire. We try to keep the wild grass around the house short, but it is difficult. The one corner of our yard has a drop of 45 degrees!! When you cut the grass with a bushcutter, you walk up one step and slide back down two steps. Sometimes we will burn a few meters of grass around our house to help to make it safer for us. This season we got four sheep to help us in our fight against the growing grass. I must say, they really did a very good job in a very short time. They are all as round as balls and very healthy.
Please pray with us that we won't have a fire this winter.