Heavy rain, flash flooding and severe weather threat will expand intothe central Gulf Coast States, Tennessee Valley and parts of the Southeaston Wednesday, reaching into the Midwest, Ohio Valley and the East Coast byThursday.Critical fire danger remains over the Texas Big Bend and Rio GrandeValley through this evening.A very active weather pattern is currently unfolding throughout much ofthe southern Plains and lower Mississippi Valley as numerous showers andthunderstorms impact the region, ...