July 12, 2014; 8:59 AM ET
Strong thunderstorms will threaten Chicago this weekend before the city gets a taste of September. more >
Rain and a thunderstorm from this morning to late tonight can lead to flooding; storms can bring downpours, large hail and damaging winds
A new map shows the path of H1N1 "swine flu" as it spread across the United States in the fall of 2009, when the brunt of the pandemic hit the country.