Television networks are tapping into a mounting challenge affecting many US homeowners: Rebuilding after disasters.

Rachael Ray — the chef whose TV programs on quick dinners gained popularity in the early 2000s — has created a new show called Rachael Ray’s Rebuild that’s focused on fixing properties after floods, tornadoes and even catastrophes not caused by weather, such as house fires. It’s part of the push by television networks into shows to help owners address complicated parts of maintaining homes, such as HGTV’s Renovation 911 program that debuted earlier this year.

The shows are one sign that the rise in extreme weather events, often driven by climate change, is se

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