Edition: Singapore Indonesia Asia US/UK WASHINGTON: The United States is experiencing its first significant heat wave of the year, beginning Friday (Jun 20) across the Great Plains and expanding into parts of the Midwest and Great Lakes over the weekend, according to the National Weather Service (NWS). The extreme heat is expected to intensify as it shifts to the East Coast early next week, with temperatures reaching the highest level on the NWS HeatRisk tool: Level 4, or "Extreme." "Numerous