'Excessive heat warning' in effect Monday for south Louisiana, but there's relief on the way _lowres

Advocate staff photo by HILARY SCHEINUK -- From left, Aaron Honore, his son Hayes, 3, and daughter Olivia, 5, cool off with a couple of clear bubblegum snowballs, Friday, August 7, 2015, at Sno-Man Snowballs on Burbank.

.

The current stretch of brutally hot weather for south Louisiana could reach its steamiest point Monday.

The National Weather Service said Monday's heat is likely to be the worst of the summer. The forecast high is 103 for Baton Rouge, 94 for New Orleans and 100 for Lafayette. Heat indexes will range from 106-115.

All three areas are under an excessive heat warning until 7 p.m. Monday.

Ready for some rain? Keep reading...

Starting Tuesday night, there's a 50-50 chance of seeing wet stuff fall from the sky, and a 30-40 percent chance should be in the forecast Thursday and onward, the NWS said.

Monday will also likely be the 43rd-straight day New Orleans will see 90-plus degree temperatures. That's the third-longest streak in history, according to the NWS.