SLIDELL, La. (WVUE) - Flooding closed parts of Gause Boulevard in Slidell on Thursday as heavy rainfall overwhelmed the area and high winds overturned a semi truck on the Oak Harbor entry ramp to Interstate 10. Slidell Police Chief Tommy Williams said the water was receding but remained high in several areas. He advised drivers to use Frenchman Avenue, which runs parallel to Gause Boulevard and has less flooding.