I have red electric baseboard wiring. We flooded and the baseboards were thrown out before I could determine their wattages. The wire is hooked up to two 20amp breakers. There were 2 heaters run in series. Can I hook up two 2000w heaters?

A 20 Amp 240 volt circuit for electric heat can only handle 3840 watts, so no, it cannot handle two 2000 watt heaters.