Hot, dry weather kills off ticks. The dehydrate relatively easily (not for human consumption! LOL) I have seen a couple videos and podcasts on that over the last year. Grant Woods just had one on his YouTube channel the other day with 2 professors form Oklahoma. The focus was on the fact that tick populations seem to be highest in areas with significant amounts of Eastern Red Cedar. The cedars themselves create a microclimate that is more favorable to the ticks surviving hot, dry conditions. If you can run a growing season fire through an area you significantly knock the tick population down as well.