( CNN ) -- Tempestuous weather is striking the United States on four fronts . It seems as if Mother Nature is trying to throw much of the nation one extreme or another . Here 's a roundup : . First tropical storm of the season ? An area of `` disturbed weather '' in the Gulf of Mexico , off the Yucatan Peninsula , could bring heavy rain and flooding to the Florida Peninsula and the Georgia and Carolina coasts by Thursday , CNN meteorologist Sean Morris said . Morris says he 'll be watching to see if the bad weather becomes the first tropical depression -- or even the first tropical storm -- of the 2013 Atlantic hurricane season , which runs from June 1 to November 30 . At a minimum , the storms could cause a lot of rainfall and flooding on the Florida Peninsula , he said . Fires . A 32,000-acre wildfire is burning some old-growth chaparral that lies in the western tip of the Mojave Desert in northern Los Angeles County . Firefighters have brought the Powerhouse Fire 60 % under control , said Ed Gilliland of the U.S. Forest Service . Six homes have been destroyed , but conditions are safe enough to lift evacuation orders and allow people to return to the communities of Green Valley , Leona Valley , Elizabeth Lake and Lake Hughes , authorities said . Higher humidity and lower temperatures should help firefighters , Gilliland said . Added Morris : `` They are n't expecting gusty winds in that area , so the conditions should be favorable for the firefighters to gain some ground there , which they have been . '' In New Mexico , a wildfire is burning nearly uncontrollably in the mountains at Pecos . The Tres Lagunas Fire is only 7 % contained and has charred 8,500 acres , authorities said , adding that crews are trying to protect structures in Holy Ghost Canyon . Floods . The mighty Mississippi River is now at major flood stage in St. Louis , but the worst of it is over and waters will recede this week , Morris said . The river has risen to more than 10 feet above flood stage . Downriver , however , Cape Girardeau , Missouri , could face flooding as the surge moves downstream , Morris said . But the city will be the last along the river to face such a threat , because the river begins to widen south of there , Morris said . `` We 're expecting Cape Girardeau to reach major flood stage tonight and crest at the end of the week , '' Morris said Tuesday . Crews in West Alton , Missouri -- a town just north of St. Louis where the Mississippi and Missouri rivers meet -- were reinforcing their levees with sandbags . The bridge to Alton , Illinois , was shut down after a temporary flood barricade failed . On Tuesday , the Mississippi breached a 100- to 150-foot section of the levee close to the confluence , and authorities have notified 43 homes , said Rivers Pointe Fire Chief Rick Pender in West Alton . Water has reportedly traveled two miles inside the levee . Tornado Alley . Still reeling from deadly twisters , Oklahoma faced a slight risk of thunderstorms Tuesday , but the good news is there 's only a slight chance of an isolated tornado , Morris said . There is , however , a chance of large hail and damaging straight-line winds in northwest Oklahoma , he said . `` For most of the state , it 's just a very slight risk of severe storms , '' Morris said . There is also a slight risk of severe weather for the southern half of Kansas , far northern Texas and southeast Colorado . Oklahoma 's recent storms have killed 19 people , said Shanea Scully , administrative coordinator for the Oklahoma City Fire Department . The tornado that struck El Reno , Oklahoma , on May 31 was declared to be the widest in history , at 2.6 miles , and its damage rating was raised to EF5 , the most severe , the National Weather Service announced Tuesday .
NEW : Mississippi River breaches levee near confluence with Missouri River . Heavy rain heads to Florida with season 's first possible tropical depression . Wildfires burn in Los Angeles area and New Mexico . Thunderstorms may hit Oklahoma , but mercifully , more tornadoes are a long shot .