That was just to August 6th. The last 4 days were also the hottest, so 40 days now. Assuming today is also the hottest August 11, tomorrow will be actually be 41. :)
"Tumble" does not mean "occur rapidly" here. It means "broken". When a world record is broken, it falls or tumbles. These are climate world records, like "hottest day ever".
We can't deny them access to the river since Mexico owns the other shore. So they're free to jump in, free to swim across, just not get out the other side.
What are "Moons"?