 Thursday trading on Wall Street. The Dow's up 27. The S&P 500 is down 22. The Nasdaq's down 167 points. That's a 1% loss. Jeff Clayball, WTOP News. Jeff, thank you. 1042. This extreme heat we've been dealing with for a long number of days here can trigger headaches and migraines for some folks. WTOP's Lynn Bowie spoke to a doctor about how you can avoid getting them.