Runners in the 2026 Bank of America Chicago Marathon could wind up racing in the rain thanks to remnants of the newly formed Tropical Storm Isaias in the Gulf.

The Big Island could see up to 20 inches of rain as residents brace for flooding, mudslides and damaging winds while still recovering from an earlier hurricane.

Hurricane Polo delivered heavy rain on Mexico’s Pacific coast Thursday as the powerful system appeared on a track to deliver indirect impacts to Southern California this weekend. Polo has changed between Category 4 and 5 strength and was expected to skirt Mexico’s coast over the next few days.

As of Thursday, Oct. 8, Isaias is a Category 1 hurricane, the first of the 2026 Atlantic season. Track the storm and see potential impact to NC.

Pensacola, Florida sits directly in the path of Hurricane Isaias as the storm strengthens into a Category 3 storm. Pensacola Mayor D.C. Reeves joins NBC News NOW to discuss evacuations and warnings issued to residents and tourists as the storm nears.

Hurricane Isaias is expected to continue to intensify before making landfall late Friday or early Saturday. See latest update from Hurricane Center.