Humanitarian groups urge leaders to act on threat from extreme heat
                        
                                                    
                                
                                
                                
                                
                                
                                    Extreme heat is one of the most deadly problems from climate change even though it receives less attention than other knock-on effects like hurricanes and flooding, two of the world's leading humanitarian organisations warned Thursday.                                
                            
                        
                        
                                                    
                        
                        
    
    
        
            
            
        
        
    
                        
                            Extreme heat is one of the most deadly problems from climate change even though it receives less attention than other knock-on effects like hurricanes and flooding, two of the world's leading humanitarian organisations warned Thursday.