• Underprivileged segments hit hardest • Bike riders, office workers, labourers struggle to cope with extreme heat • Outdoor workers face hardship, household chores become tall order KARACHI: By midday, Karachi, a city usually bustling with activity, begins to lose much of its vibrancy as intense heat and persistently high “feels-like” temperatures keep people indoors and restrict movement across the metropolis. The scorching June sun, coupled with high humidity and feels-like temperatures ex...