Search-and-rescue efforts have turned to a cleanup operation are underway after a string of tornadoes ripped across large parts of central and southern United States, leaving at least 34 people dead.
Emergency recovery clear-up crews and volunteers have been working to clear mass piles of debris scattered across affected regions as the disaster has left many residents with no possessions.
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The man, in his thirties, was found with stab injuries on the upper deck of a bus in Handsworth, Birmingham, on Monday night.
Thousands of passengers now face delays, with Southeastern trains warning "all services" would be affected.
Paramedics attended a scene in Willesden, north-west London, on Monday afternoon where they found the teenager with stab wounds.