Now, tenants are crowding courtrooms — or appearing virtually — to detail how the pandemic has upended their lives. Some are low-income families who have endured evictions before, but there are also plenty of wealthier families facing homelessness for the first time — and now being forced to navigate overcrowded and sometimes dangerous shelter systems amid the pandemic. Experts predict the problem will only get worse in the coming weeks, with 30 million unemployed and uncertainty whether Congress will extend the extra $600 in weekly unemployment benefits that expired Friday. The federal eviction moratorium that protects more than 12 million renters living in federally subsidized apartments or units with federally backed mortgages expired July 25. If it’s not extended, landlords can initiate eviction proceedings in 30 days.