“For perspective:
https://en.wikipedia.org/wiki/U.S._state_and_territory_temperature_extremes ”
The average of the record high temperature years is about 1955 - so more than half a century ago. I’m not claiming that this is scientific proof of anything, but it doesn’t support the global warming claims.
(I do think the planet is warming - after all, we are coming out of an ice age - but I’m skeptical of the extreme claims attributing this to the burning of fossil fuels.)