I've noticed an uptick in the heat and humidity and notice on the calendar that 'dog days' have arrived.
These particular 'dog days' are those mentioned in that old weather and folklore standard in the United States, the Old Farmer's Almanac. They do not correspond to established the meaning recognized in most European cultures.
However, being in the US of A I'm satisfied to stick with our own spin on this weather phenomenon ... and to stay in the air conditioning as well.
The dog days or dog days of summer are the hottest, most oppressive days of summer.
History marks the rise of the star system Sirius aka the "Dog Star" with associated heat, lethargy, droughts, sudden thunderstorms, fever, mad dogs, and even episodic bad luck since the ancient world as known in Greece. They are now taken to be the hottest, most uncomfortable part of summer in the Northern Hemisphere ... and they have begun.