As the hottest weather of the summer so far builds across the northeastern United States to end this week, rounds of severe thunderstorms with high winds will be on the prowl, and some locations may have to face a familiar flash flooding problem, AccuWeather meteorologists say. During a strange summer in the Northeast where Canadian air and wildfire smoke held temperatures back in June and tropical moisture caused downpours and thunderstorms to flourish during much of July, many people are proba