Pubs across England were reopening Saturday in an effort at normal life, while South Africa signaled anything but — reporting another record daily high in confirmed coronavirus cases as the health system showed strain. “Let’s not blow it now,” British Prime Minister Boris Johnson said as some in England rushed to restaurants or barbers for the first time in more than three months. The U.S. plunged into Fourth of July weekend with many parades and fireworks displays canceled, and health authorities warned it will be a crucial test of Americans’ self-control.