You shouldn't have a problem with lids not sealing if you do it right, even in high temps.
But you can freeze the figs and make preserves later when it's cooler. Clean the figs and cut off the stem end, put in a 1 gallon ziplock and freeze. When you're ready just use it straight from the freezer and it will work fine. Here's a video that shows you how WE have been doing it forever.
https://www.youtube.com/watch?featur...&v=OKpcAr0MEBM