I agree that a "beam of instant death" would be unlikely due to the probable low power density. But, couldn't it be high enough to cause significant heating and

I agree that a "beam of instant death" would be unlikely due to the probable low power density. But, couldn't it be high enough to cause significant heating and health issues? As some anecdata, I remember a decades-ago report that said it would be safe to graze cattle under the receiving antennas, which suggests both that a) it wouldn't be safe for cattle above the receiving antennas, and b) it wouldn't be safe for humans even under the receiving antennas.