In a crisis like this, communication is key. All utility customers should keep these numbers handy. No. 1: Utility hotlines ComEd: Residential: 1-800-EDISON-1 (1-800-334-7661)  Spanish: 1-800-95-LUCES (1-800-955-8237)  Business: 1-877-4-COMED-1 (1-877-426-6331) Emergencies: 1-800-334-7661 Payment arrangements and credit issues; 1-800-334-7661 Ameren: Residential: 1-800-755-5000 Business: 1-800-232-2477 Nicor:  Emergencies, or to speak to someone about your account or billing information: is…...