Today is the first day of the Democratic National Convention, which is scripted to make Hillary Clinton the first female candidate for president from a major political party.

Keep checking this page throughout the day for updates as the convention gets started.

3:03 p.m.: Traffic is going to be heavy on Interstate 95 all week due to lane closures. SEPTA, meanwhile, was reporting crowded subways on the Broad Street Line.

2:59 p.m.: For the second day in a row, supporters of Bernie Sanders have held big marches down Broad Street and elsewhere in Center City.

2:45 p.m.: Political cartoonists are taking over an Old City gallery this week.

2:41 p.m.: One of the next marches planned, starting like many others near City Hall, is organized by the Poor People's Economic Human Rights Campaign and begins soon.

2:32 p.m.: Among the local speakers taking the stage at the Wells Fargo Center tonight: Sens. Cory Booker and Bob Casey, Philadelphia Mayor Jim Kenney and U.S. Reps. Bob Brady and Brendan Boyle.

2:20 p.m.: Philadelphia's Maternity Care Coalition has set up curtained breast-feeding stalls at the Wells Fargo Center for lactating mothers.

2:11 p.m.: Philadelphia's top cop says police have had no confrontations with protesters thus far.

1:56 p.m.: One group of Bernie Sanders backers is making its way through Center City, while another is marching south on Broad Street, leading to some street closures there. Those attending demonstrations should note that a severe thunderstorm watch is in place until this evening, in addition to an excessive heat warning.

1:44 p.m.: Outgoing Democratic National Committee chairwoman Debbie Wasserman Schultz tells the Sun Sentinel that she will not open the party's convention tonight.

1:36 p.m.: As Bernie Sanders wrapped up his remarks to his delegates, a group of supporters that congregated at City Hall this morning is starting to march south on Broad Street toward the convention site.

1:24 p.m.: A group of pro-Bernie Sanders protesters marched across the Benjamin Franklin Bridge's pedestrian walkway. They've made it across the Delaware River and into Philadelphia.

1:19 p.m.: Bernie Sanders has started speaking to his delegates. Follow @ByChrisBrennan@AngelasInk and @panaritism for updates.

1:12 p.m.: At a Bernie Sanders delegates meeting, mentions of both Hillary Clinton and Debbie Wasserman Schultz  are drawing boos.

1:01 p.m.: Multiple protests are happening around the city now. A group of Bernie Sanders supporters are making their way over the Benjamin Franklin Bridge. Another group of Sanders supporters are at City Hall, preparing for a march. A Black Lives Matter and pro-police groups are both at FDR Park.

12:41 p.m.: Groups of Bernie Sanders supporters have set up camp in FDR Park. They stayed overnight, and protesters were still there Monday afternoon, when some were demonstrating against police brutality. Meanwhile, the Sanders supporters near City Hall are beginning to march toward FDR Park.

12:30 p.m.: Bernie Sanders' speech at the Pennsylvania Convention Center has attracted a big crowd, and delegates are eagerly awaiting his remarks.

12:22 p.m.: Here's the scene at the Wells Fargo Center early this afternoon:

12:20 p.m.: Bernie Sanders delegates say they hope to field their own vice presidential candidate against Virginia Sen. Timothy Kaine, Hillary Clinton's pick as her running mate.

12:14 p.m.: The immigration march, which started in South Philly this morning, has made its way to City Hall.

12:01 p.m.: Some Philadelphia bars will be open until 4 a.m. during the convention. Here's the list.

11:56 a.m.: Comcast has opened 10,000 Wifi hotspots across the Philadelphia area for the DNC.

11:45 a.m.: Marijuana activists are getting ready to start a protest near City Hall.

11:28 a.m.: The FBI is looking into the leaked DNC emails, the Associated Press reports.

10:44 a.m.: Follow @McDanielJustine for updates as Bernie Sanders delegates get ready for a march starting from City Hall.

Will the pro-Sanders groups come around to supporting Hillary Clinton?

10:29 a.m.: On "Morning Joe" this morning, Mayor Jim Kenney spoke bluntly about Black Lives Matter, equal rights and gun control: "The issue of Black Lives Matter is that they do. Because they haven't mattered in our country over the history of law enforcement and in the criminal courts and in the way people have been treated from the 1600's up until now." The MSNBC show will be broadcasting from McGillin's Olde Ale House all week.

10:20 a.m.: Speeches on the convention's first night are set to focus on the economy.

10:15 a.m.: Bernie Sanders supporters are starting to gather at City Hall in advance of a march.

10:09 a.m.: Listen now: Reporter Julia Terruso is talking with WHYY's Radio Times about the DNC.

9:58 a.m.: Immigration groups are gathering in South Philadelphia for a march to City Hall. Follow @MichaelMatza for updates.

9:50 a.m.: Debbie Wasserman Schultz, originally scheduled to speak at the Pennsylvania delegation's breakfast this morning, was booed off the stage when addressing delegates from her home state.

9:42 a.m.: A Center City therapist has created a network for activists or protesters who need support to get free or discounted counseling.

9:27 a.m.: There's more than one camp happening in South Philadelphia this morning. (If you're interested in the non-political one, live updates from the Eagles' training camp are here.)

9:09 a.m.: A handful of Bernie Sanders supporters stayed at FDR Park overnight and are planning a 10 a.m. march. Follow @mccabe_caitlin for more updates from Sanders supporters at the park.

9:07 a.m.: U.S. Sen. Cory Booker (D-N.J.) is talking to the Pennsylvania delegation this morning, and will speak at the Wells Fargo Center tonight.

9:01 a.m.: Maps from PennDot show current traffic conditions around Philadelphia. Big delays are being reported on Interstate 95, where commercial trucks that weigh more than 5 tons aren't permitted.

8:37 a.m.: The first delegation breakfasts are underway.

8:18 a.m.: Researchers have concluded that two Russian intelligence agencies breached the Democratic National Committee's servers, the New York Times reports. The cyberattack led to the release of embarrassing emails and chairwoman Debbie Wasserman Schultz announcing that she plans to step down after this week's convention.

7:58 a.m.: SEPTA says the Broad Street Line equipment problems have been resolved, but some delays are continuing.

7:53 a.m.: Reporter Jonathan Tamari breaks down the major stories to watch on day one of the convention: Bernie Sanders' prime time speech, Michelle Obama's address, how much attention gets paid to the Pennsylvania delegation and what will happen at pro-Sanders demonstrations.

7:43 a.m.: Trains heading south – toward the Wells Fargo Center – on SEPTA's Broad Street Line are running with 20-minute delays because of equipment problems.

7:28 a.m.: At a campsite in South Jersey, supporters of Bernie Sanders were still talking about political revolution well into early Monday morning. Scores of protesters have set up camp there in preparation for marches happening throughout the week.

7:17 a.m.: A heads up for protesters, police and anyone else planning to spend a significant amount of time outside today: The National Weather Service has issued an excessive heat warning.

6:31 a.m.: The main event gets underway at 7 p.m. at the Wells Fargo Center in South Philadelphia, where First Lady Michelle Obama, Sen. Bernie Sanders and Sen. Elizabeth Warren, are among the scheduled speakers. But there will be a series of political events and protests throughout the day. You can find our regularly updated schedule here.

It's going to be a steamy day marked by temperatures in the high 90s and possible thunderstorms. Thunderstorms this morning prompted convention organizers to advise those working in media tents at the WFC that tents were "not designed to fully protect inhabitants in the event of a direct lightning strike." Anyone in the tents was directed go into the arena.

There are no reports of any major traffic or mass transit problems.

On the eve of today's gathering, thousands of the environmentalists and Sanders supporters filled the streets for protests in sweltering heat and the Democratic National Party found itself wrestling with the resignation of Debbie Wasserman Schultz as party chairwoman over an email scandal.

Our complete coverage of the DNC, including things to do, how to get around and where to eat, can be found here.

And to see this evening's blog, click here.