I was travelling heavily right before I had a massive dissection on a business trip. The day before, we had a spare travel day and we were also out running around in the Anza Borrego Desert near San Diego when it was 113F degrees. Big mistake. It nearly cost me my life. Heat raises blood pressure. Stay cool, don't stress, relax, and don't do any exercises that require you to hold your breath (Valsalva maneuver) and no planking. Just take it easy. Lots of walking but no deadlifting. Peace.