Authorities in the United States say water levels are peaking in parts of flood-ravaged Houston as thousands of people continue to flee their homes - putting emergency services and temporary shelters under increasing strain.

At least 20 people have died, 13,000 have been rescued and about 40,000 homes have been destroyed after record rainfall from Tropical Storm Harvey.

 

Al Jazeera's Heidi Zhou-Castro reports from Houston.

US & Canada, United States, Weather