By Dan Weil Rent rises are especially sharp in one particular U.S. region, which has seen major population inflows since the pandemic began. Those of you who are renters have probably seen directly what’s happening with rental rates — up, up and away. And it’s not just apartment rents that are soaring. U.S. single-family-home rent jumped 12.6% year-on-year in January, the 10 record monthly gain in a row, according to real estate research firm CoreLogic. Its data go back to 2004. The increase more than tripled the one for January 2021. The measure includes condominium rentals. The price surge …