Weather tracker: Severe storms in US as Delhi swelters in intense heatwave

US tornado season proving to be one of the most active of recent years as severe thunderstorms hamper recovery efforts

The US was struck by violent storms over the Memorial Day holiday weekend, with Sunday named the worst weather day so far this year after more than 600 reports of damage were received from 20 states.

Storms developed across central southern areas on Saturday night before spreading farther east on Sunday, with more than 60 confirmed tornadoes resulting in at least 26 deaths. Northern Texas, Oklahoma, Arkansas and Kentucky were worst affected, with wind speeds of up to 135mph recorded, strong enough to overturn an 18-wheel truck near Dallas.