The dual threats of heat and drought could spell disaster for communities along the US west coast, as the region faces the potential for record temperatures this weekend and more in store for the summer. With a heat wave gripping much of the region for over the past week, the threat for wildfires, blackouts and water shortages only increases as it experiences its worst drought in 20, and potentially even 1,200 years if it continues, and even hotter conditions are expected for this weekend. Already, temperatures have reached 116 degrees in Las Vegas and 115 degrees in Phoenix. On Thursday,...